diff --git a/dist/vue-apollo.esm.js b/dist/vue-apollo.esm.js
index 5cb9e02..7f7bc05 100644
--- a/dist/vue-apollo.esm.js
+++ b/dist/vue-apollo.esm.js
@@ -665,7 +665,7 @@ function () {
       } else if (error.networkError) {
         console.error("Error sending the ".concat(this.type, " '").concat(this.key, "'"), error.networkError);
       } else {
-        console.error("[vue-apollo] An error has occured for ".concat(this.type, " '").concat(this.key, "'"));
+        console.error("[vue-apollo] An error has occurred for ".concat(this.type, " '").concat(this.key, "'"));
 
         if (Array.isArray(error)) {
           var _console;
@@ -1513,7 +1513,7 @@ function formatObjectValue(value, previouslySeenValues) {
   if (value) {
     var customInspectFn = getCustomFn(value);
 
-    if (customInspectFn) {
+    if (customInspectFn !== undefined) {
       // $FlowFixMe(>=0.90.0)
       var customValue = customInspectFn.call(value); // check for infinite recursion
 
@@ -1633,8 +1633,10 @@ classObject) {
  * 
  */
 function invariant(condition, message) {
+  var booleanCondition = Boolean(condition);
   /* istanbul ignore else */
-  if (!condition) {
+
+  if (!booleanCondition) {
     throw new Error(message);
   }
 }
@@ -1872,14 +1874,14 @@ function lpad(len, str) {
   return whitespace(len - str.length) + str;
 }
 
+function _typeof$2(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof$2 = function _typeof(obj) { return typeof obj; }; } else { _typeof$2 = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof$2(obj); }
 /**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * 
+ * A GraphQLError describes an Error found during the parse, validate, or
+ * execute phases of performing a GraphQL operation. In addition to a message
+ * and stack trace, it also includes information about the locations in a
+ * GraphQL document and/or execution result that correspond to the Error.
  */
+
 function GraphQLError( // eslint-disable-line no-redeclare
 message, nodes, source, positions, path, originalError, extensions) {
   // Compute list of blame nodes.
@@ -1925,7 +1927,15 @@ message, nodes, source, positions, path, originalError, extensions) {
     }, []);
   }
 
-  var _extensions = extensions || originalError && originalError.extensions;
+  var _extensions = extensions;
+
+  if (_extensions == null && originalError != null) {
+    var originalExtensions = originalError.extensions;
+
+    if (originalExtensions != null && _typeof$2(originalExtensions) === 'object') {
+      _extensions = originalExtensions;
+    }
+  }
 
   Object.defineProperties(this, {
     message: {
@@ -2070,24 +2080,11 @@ function dedentBlockStringValue(rawString) {
   // Expand a block string's raw value into independent lines.
   var lines = rawString.split(/\r\n|[\n\r]/g); // Remove common indentation from all lines but first.
 
-  var commonIndent = null;
+  var commonIndent = getBlockStringIndentation(lines);
 
-  for (var i = 1; i < lines.length; i++) {
-    var line = lines[i];
-    var indent = leadingWhitespace(line);
-
-    if (indent < line.length && (commonIndent === null || indent < commonIndent)) {
-      commonIndent = indent;
-
-      if (commonIndent === 0) {
-        break;
-      }
-    }
-  }
-
-  if (commonIndent) {
-    for (var _i = 1; _i < lines.length; _i++) {
-      lines[_i] = lines[_i].slice(commonIndent);
+  if (commonIndent !== 0) {
+    for (var i = 1; i < lines.length; i++) {
+      lines[i] = lines[i].slice(commonIndent);
     }
   } // Remove leading and trailing blank lines.
 
@@ -2102,6 +2099,29 @@ function dedentBlockStringValue(rawString) {
 
 
   return lines.join('\n');
+} // @internal
+
+function getBlockStringIndentation(lines) {
+  var commonIndent = null;
+
+  for (var i = 1; i < lines.length; i++) {
+    var line = lines[i];
+    var indent = leadingWhitespace(line);
+
+    if (indent === line.length) {
+      continue; // skip empty lines
+    }
+
+    if (commonIndent === null || indent < commonIndent) {
+      commonIndent = indent;
+
+      if (commonIndent === 0) {
+        break;
+      }
+    }
+  }
+
+  return commonIndent === null ? 0 : commonIndent;
 }
 
 function leadingWhitespace(str) {
@@ -2201,13 +2221,10 @@ var TokenKind = Object.freeze({
   BLOCK_STRING: 'BlockString',
   COMMENT: 'Comment'
 });
-/**
- * The enum type representing the token kinds values.
- */
-
 /**
  * A helper function to describe a token as a string for debugging
  */
+
 function getTokenDesc(token) {
   var value = token.value;
   return value ? "".concat(token.kind, " \"").concat(value, "\"") : token.kind;
@@ -2631,17 +2648,19 @@ function readString(source, start, line, col, prev) {
           break;
 
         case 117:
-          // u
-          var charCode = uniCharCode(body.charCodeAt(position + 1), body.charCodeAt(position + 2), body.charCodeAt(position + 3), body.charCodeAt(position + 4));
+          {
+            // uXXXX
+            var charCode = uniCharCode(body.charCodeAt(position + 1), body.charCodeAt(position + 2), body.charCodeAt(position + 3), body.charCodeAt(position + 4));
 
-          if (charCode < 0) {
-            throw syntaxError(source, position, 'Invalid character escape sequence: ' + "\\u".concat(body.slice(position + 1, position + 5), "."));
+            if (charCode < 0) {
+              throw syntaxError(source, position, 'Invalid character escape sequence: ' + "\\u".concat(body.slice(position + 1, position + 5), "."));
+            }
+
+            value += String.fromCharCode(charCode);
+            position += 4;
+            break;
           }
 
-          value += String.fromCharCode(charCode);
-          position += 4;
-          break;
-
         default:
           throw syntaxError(source, position, "Invalid character escape sequence: \\".concat(String.fromCharCode(code), "."));
       }
@@ -4219,7 +4238,7 @@ function parseDirectiveLocation(lexer) {
   var start = lexer.token;
   var name = parseName(lexer);
 
-  if (DirectiveLocation.hasOwnProperty(name.value)) {
+  if (DirectiveLocation[name.value] !== undefined) {
     return name;
   }
 
@@ -4704,7 +4723,7 @@ var CApolloQuery = {
           _result = Object.assign({}, _result);
 
           if (errors && errors.length) {
-            error = new Error("Apollo errors occured (".concat(errors.length, ")"));
+            error = new Error("Apollo errors occurred (".concat(errors.length, ")"));
             error.graphQLErrors = errors;
           }
 
@@ -5132,7 +5151,7 @@ function install(Vue, options) {
 }
 ApolloProvider.install = install; // eslint-disable-next-line no-undef
 
-ApolloProvider.version = "3.0.0-beta.30"; // Apollo provider
+ApolloProvider.version = "3.0.0-rc.1"; // Apollo provider
 
 var ApolloProvider$1 = ApolloProvider; // Components
 
diff --git a/dist/vue-apollo.min.js b/dist/vue-apollo.min.js
index 77a6d8e..1c61230 100644
--- a/dist/vue-apollo.min.js
+++ b/dist/vue-apollo.min.js
@@ -1 +1 @@
-var VueApollo=function(t){"use strict";function r(t){return(r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t})(t)}function a(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}function i(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}function n(t,e,n){return e&&i(t.prototype,e),n&&i(t,n),t}function s(t,e,n){return e in t?Object.defineProperty(t,e,{value:n,enumerable:!0,configurable:!0,writable:!0}):t[e]=n,t}function l(e){for(var t=1;t<arguments.length;t++){var n=null!=arguments[t]?arguments[t]:{},r=Object.keys(n);"function"==typeof Object.getOwnPropertySymbols&&(r=r.concat(Object.getOwnPropertySymbols(n).filter(function(t){return Object.getOwnPropertyDescriptor(n,t).enumerable}))),r.forEach(function(t){s(e,t,n[t])})}return e}function e(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function");t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,writable:!0,configurable:!0}}),e&&o(t,e)}function u(t){return(u=Object.setPrototypeOf?Object.getPrototypeOf:function(t){return t.__proto__||Object.getPrototypeOf(t)})(t)}function o(t,e){return(o=Object.setPrototypeOf||function(t,e){return t.__proto__=e,t})(t,e)}function c(t){if(void 0===t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return t}function h(t,e){return!e||"object"!=typeof e&&"function"!=typeof e?c(t):e}function f(t,e,n){return(f="undefined"!=typeof Reflect&&Reflect.get?Reflect.get:function(t,e,n){var r=function(t,e){for(;!Object.prototype.hasOwnProperty.call(t,e)&&null!==(t=u(t)););return t}(t,e);if(r){var i=Object.getOwnPropertyDescriptor(r,e);return i.get?i.get.call(n):i.value}})(t,e,n||t)}function p(t,e){return function(t){if(Array.isArray(t))return t}(t)||function(t,e){var n=[],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done)&&(n.push(a.value),!e||n.length!==e);r=!0);}catch(t){i=!0,o=t}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}(t,e)||function(){throw new TypeError("Invalid attempt to destructure non-iterable instance")}()}function d(t){return function(t){if(Array.isArray(t)){for(var e=0,n=new Array(t.length);e<t.length;e++)n[e]=t[e];return n}}(t)||function(t){if(Symbol.iterator in Object(t)||"[object Arguments]"===Object.prototype.toString.call(t))return Array.from(t)}(t)||function(){throw new TypeError("Invalid attempt to spread non-iterable instance")}()}function v(i,o,a,s){var u,c=!1,l=0;function h(){u&&clearTimeout(u)}function t(){var t=this,e=Date.now()-l,n=arguments;function r(){l=Date.now(),a.apply(t,n)}c||(s&&!u&&r(),h(),void 0===s&&i<e?r():!0!==o&&(u=setTimeout(s?function(){u=void 0}:r,void 0===s?i-e:i)))}return"boolean"!=typeof o&&(s=a,a=o,o=void 0),t.cancel=function(){h(),c=!0},t}var y,b=Object.freeze({throttle:v,debounce:function(t,e,n){return void 0===n?v(t,e,!1):v(t,n,!1!==e)}}),E=(function(t,e){var n=e.Globals={};function r(n){return function(t,e){return n(e,t)}}e.throttle=r(b.throttle),e.debounce=r(b.debounce),e.getMergedDefinition=function(t){return n.Vue.util.mergeOptions({},t)},e.reapply=function(t,e){for(;"function"==typeof t;)t=t.call(e);return t},e.omit=function(t,n){return Object.entries(t).filter(function(t){var e=p(t,1)[0];return!n.includes(e)}).reduce(function(t,e){var n=p(e,2),r=n[0],i=n[1];return t[r]=i,t},{})},e.addGqlError=function(t){t.graphQLErrors&&t.graphQLErrors.length&&(t.gqlError=t.graphQLErrors[0])},e.noop=function(){}}(y={exports:{}},y.exports),y.exports),m=E.Globals,g=E.throttle,N=E.debounce,k=(E.getMergedDefinition,E.reapply),A=E.omit,O=E.addGqlError,I=(E.noop,function(){function i(t,e,n){var r=!(3<arguments.length&&void 0!==arguments[3])||arguments[3];a(this,i),s(this,"type",null),s(this,"vueApolloSpecialKeys",[]),this.vm=t,this.key=e,this.initialOptions=n,this.options=Object.assign({},n),this._skip=!1,this._watchers=[],this._destroyed=!1,r&&this.autostart()}return n(i,[{key:"autostart",value:function(){"function"==typeof this.options.skip?this._skipWatcher=this.vm.$watch(this.options.skip.bind(this.vm),this.skipChanged.bind(this),{immediate:!0,deep:this.options.deep}):this.options.skip?this._skip=!0:this.start()}},{key:"skipChanged",value:function(t,e){t!==e&&(this.skip=t)}},{key:"refresh",value:function(){this._skip||(this.stop(),this.start())}},{key:"start",value:function(){var e=this;if(this.starting=!0,"function"==typeof this.initialOptions.query){var t=this.initialOptions.query.bind(this.vm);this.options.query=t(),this._watchers.push(this.vm.$watch(t,function(t){e.options.query=t,e.refresh()},{deep:this.options.deep}))}if("function"==typeof this.initialOptions.document){var n=this.initialOptions.document.bind(this.vm);this.options.document=n(),this._watchers.push(this.vm.$watch(n,function(t){e.options.document=t,e.refresh()},{deep:this.options.deep}))}if("function"==typeof this.initialOptions.context){var r=this.initialOptions.context.bind(this.vm);this.options.context=r(),this._watchers.push(this.vm.$watch(r,function(t){e.options.context=t,e.refresh()},{deep:this.options.deep}))}if("function"==typeof this.options.variables){var i=this.executeApollo.bind(this);i=this.options.throttle?g(i,this.options.throttle):i,i=this.options.debounce?N(i,this.options.debounce):i,this._watchers.push(this.vm.$watch(function(){return e.options.variables.call(e.vm)},i,{immediate:!0,deep:this.options.deep}))}else this.executeApollo(this.options.variables)}},{key:"stop",value:function(){var t=!0,e=!1,n=void 0;try{for(var r,i=this._watchers[Symbol.iterator]();!(t=(r=i.next()).done);t=!0){(0,r.value)()}}catch(t){e=!0,n=t}finally{try{t||null==i.return||i.return()}finally{if(e)throw n}}this.sub&&(this.sub.unsubscribe(),this.sub=null)}},{key:"generateApolloOptions",value:function(t){var e=A(this.options,this.vueApolloSpecialKeys);return e.variables=t,e}},{key:"executeApollo",value:function(t){this.starting=!1}},{key:"nextResult",value:function(t){var e=t.error;e&&O(e)}},{key:"callHandlers",value:function(t){for(var e=!1,n=arguments.length,r=new Array(1<n?n-1:0),i=1;i<n;i++)r[i-1]=arguments[i];var o=!0,a=!1,s=void 0;try{for(var u,c=t[Symbol.iterator]();!(o=(u=c.next()).done);o=!0){var l=u.value;if(l){e=!0;var h=l.apply(this.vm,r);if(void 0!==h&&!h)break}}}catch(t){a=!0,s=t}finally{try{o||null==c.return||c.return()}finally{if(a)throw s}}return e}},{key:"errorHandler",value:function(){for(var t=arguments.length,e=new Array(t),n=0;n<t;n++)e[n]=arguments[n];return this.callHandlers.apply(this,[[this.options.error,this.vm.$apollo.error,this.vm.$apollo.provider.errorHandler]].concat(e))}},{key:"catchError",value:function(t){if(O(t),!this.errorHandler(t))if(t.graphQLErrors&&0!==t.graphQLErrors.length){console.error("GraphQL execution errors for ".concat(this.type," '").concat(this.key,"'"));var e=!0,n=!1,r=void 0;try{for(var i,o=t.graphQLErrors[Symbol.iterator]();!(e=(i=o.next()).done);e=!0){var a=i.value;console.error(a)}}catch(t){n=!0,r=t}finally{try{e||null==o.return||o.return()}finally{if(n)throw r}}}else if(t.networkError)console.error("Error sending the ".concat(this.type," '").concat(this.key,"'"),t.networkError);else{var s;if(console.error("[vue-apollo] An error has occured for ".concat(this.type," '").concat(this.key,"'")),Array.isArray(t))(s=console).error.apply(s,d(t));else console.error(t)}}},{key:"destroy",value:function(){this._destroyed||(this._destroyed=!0,this.stop(),this._skipWatcher&&this._skipWatcher())}},{key:"skip",get:function(){return this._skip},set:function(t){t?this.stop():this.start(),this._skip=t}}]),i}()),T=["variables","watch","update","result","error","loadingKey","watchLoading","skip","throttle","debounce","subscribeToMore","prefetch","manual"],_=function(t){function o(t,e,n){var r,i=!(3<arguments.length&&void 0!==arguments[3])||arguments[3];a(this,o),n.query||(n={query:n});return t.$data.$apolloData&&!t.$data.$apolloData.queries[e]&&t.$set(t.$data.$apolloData.queries,e,{loading:!1}),s(c(r=h(this,u(o).call(this,t,e,n,!1))),"type","query"),s(c(r),"vueApolloSpecialKeys",T),s(c(r),"_loading",!1),t.$isServer&&(r.firstRun=new Promise(function(t,e){r._firstRunResolve=t,r._firstRunReject=e})),r.vm.$isServer&&(r.options.fetchPolicy="network-only"),n.manual||(r.hasDataField=r.vm.$data.hasOwnProperty(e),r.hasDataField?Object.defineProperty(r.vm.$data.$apolloData.data,e,{get:function(){return r.vm.$data[e]},enumerable:!0,configurable:!0}):Object.defineProperty(r.vm.$data,e,{get:function(){return r.vm.$data.$apolloData.data[e]},enumerable:!0,configurable:!0})),i&&r.autostart(),r}return e(o,I),n(o,[{key:"stop",value:function(){f(u(o.prototype),"stop",this).call(this),this.loadingDone(),this.observer&&(this.observer.stopPolling(),this.observer=null)}},{key:"executeApollo",value:function(t){var e=JSON.stringify(t);if(this.sub){if(e===this.previousVariablesJson)return;this.sub.unsubscribe()}if(this.previousVariablesJson=e,this.observer=this.vm.$apollo.watchQuery(this.generateApolloOptions(t)),this.startQuerySubscription(),"no-cache"!==this.options.fetchPolicy){var n=this.maySetLoading();n.loading||this.nextResult(n)}f(u(o.prototype),"executeApollo",this).call(this,t)}},{key:"startQuerySubscription",value:function(){this.sub&&!this.sub.closed||(this.sub=this.observer.subscribe({next:this.nextResult.bind(this),error:this.catchError.bind(this)}))}},{key:"maySetLoading",value:function(){var t=0<arguments.length&&void 0!==arguments[0]&&arguments[0],e=this.observer.currentResult();return(t||e.loading)&&(this.loading||this.applyLoadingModifier(1),this.loading=!0),e}},{key:"nextResult",value:function(t){f(u(o.prototype),"nextResult",this).call(this,t);var e=t.data,n=t.loading;t.error&&this.firstRunReject(),n||this.loadingDone();var r="function"==typeof this.options.result;void 0===e||(this.options.manual?r||console.error("".concat(this.key," query must have a 'result' hook in manual mode")):"function"==typeof this.options.update?this.setData(this.options.update.call(this.vm,e)):void 0===e[this.key]&&Object.keys(e).length?console.error("Missing ".concat(this.key," attribute on result"),e):this.setData(e[this.key])),r&&this.options.result.call(this.vm,t,this.key)}},{key:"setData",value:function(t){this.vm.$set(this.hasDataField?this.vm.$data:this.vm.$data.$apolloData.data,this.key,t)}},{key:"catchError",value:function(t){f(u(o.prototype),"catchError",this).call(this,t),this.firstRunReject(),this.loadingDone(t),this.nextResult(this.observer.currentResult()),this.resubscribeToQuery()}},{key:"resubscribeToQuery",value:function(){var t=this.observer.getLastError(),e=this.observer.getLastResult();this.observer.resetLastResults(),this.startQuerySubscription(),Object.assign(this.observer,{lastError:t,lastResult:e})}},{key:"watchLoading",value:function(){for(var t=arguments.length,e=new Array(t),n=0;n<t;n++)e[n]=arguments[n];return this.callHandlers.apply(this,[[this.options.watchLoading,this.vm.$apollo.watchLoading,this.vm.$apollo.provider.watchLoading]].concat(e,[this]))}},{key:"applyLoadingModifier",value:function(t){var e=this.loadingKey;e&&"number"==typeof this.vm[e]&&(this.vm[e]+=t),this.watchLoading(1===t,t)}},{key:"loadingDone",value:function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:null;this.loading&&this.applyLoadingModifier(-1),this.loading=!1,t||this.firstRunResolve()}},{key:"fetchMore",value:function(){var t,e=this;if(this.observer)return this.maySetLoading(!0),(t=this.observer).fetchMore.apply(t,arguments).then(function(t){return t.loading||e.loadingDone(),t})}},{key:"subscribeToMore",value:function(){var t;if(this.observer)return{unsubscribe:(t=this.observer).subscribeToMore.apply(t,arguments)}}},{key:"refetch",value:function(t){var e=this;if(t&&(this.options.variables=t),this.observer){var n=this.observer.refetch(t).then(function(t){return t.loading||e.loadingDone(),t});return this.maySetLoading(),n}}},{key:"setVariables",value:function(t,e){if(this.options.variables=t,this.observer){var n=this.observer.setVariables(t,e);return this.maySetLoading(),n}}},{key:"setOptions",value:function(t){if(Object.assign(this.options,t),this.observer){var e=this.observer.setOptions(t);return this.maySetLoading(),e}}},{key:"startPolling",value:function(){var t;if(this.observer)return(t=this.observer).startPolling.apply(t,arguments)}},{key:"stopPolling",value:function(){var t;if(this.observer)return(t=this.observer).stopPolling.apply(t,arguments)}},{key:"firstRunResolve",value:function(){this._firstRunResolve&&(this._firstRunResolve(),this._firstRunResolve=null)}},{key:"firstRunReject",value:function(t){this._firstRunReject&&(this._firstRunReject(t),this._firstRunReject=null)}},{key:"destroy",value:function(){f(u(o.prototype),"destroy",this).call(this),this.loading&&this.watchLoading(!1,-1),this.loading=!1}},{key:"client",get:function(){return this.vm.$apollo.getClient(this.options)}},{key:"loading",get:function(){return this.vm.$data.$apolloData&&this.vm.$data.$apolloData.queries[this.key]?this.vm.$data.$apolloData.queries[this.key].loading:this._loading},set:function(t){this._loading!==t&&(this._loading=t,this.vm.$data.$apolloData&&this.vm.$data.$apolloData.queries[this.key]&&(this.vm.$data.$apolloData.queries[this.key].loading=t,this.vm.$data.$apolloData.loading+=t?1:-1))}},{key:"loadingKey",get:function(){return 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n&&(n=n(se)),this.$apollo.mutate(l({mutation:n,client:this.clientId,variables:this.variables,optimisticResponse:this.optimisticResponse,update:this.update,refetchQueries:this.refetchQueries},t)).then(function(t){e.$emit("done",t),e.loading=!1}).catch(function(t){O(t),e.error=t,e.$emit("error",t),e.loading=!1})}},render:function(t){var e=this.$scopedSlots.default({mutate:this.mutate,loading:this.loading,error:this.error,gqlError:this.error&&this.error.gqlError});return e=Array.isArray(e)?e.concat(this.$slots.default):[e].concat(this.$slots.default),this.tag?t(this.tag,e):e[0]}};function fe(t,e){return void 0!==t&&Object.prototype.hasOwnProperty.call(t,e)}function pe(){var t=this.$options,e=t.apolloProvider;if(e)this.$apolloProvider="function"==typeof e?e():e;else if(t.parent&&t.parent.$apolloProvider)this.$apolloProvider=t.parent.$apolloProvider;else if(t.provide){var n="function"==typeof t.provide?t.provide.call(this):t.provide;n&&n.$apolloProvider&&(this.$apolloProvider=n.$apolloProvider)}}function de(){var t=this,e=this.$apolloProvider;if(!this._apolloLaunched&&e){this._apolloLaunched=!0;var n=this.$options.apollo;if(n){for(var r in this.$_apolloPromises=[],n.$init||(n.$init=!0,e.defaultOptions&&(n=this.$options.apollo=Object.assign({},e.defaultOptions,n))),ve(this.$apollo,"skipAll",n.$skipAll,n.$deep),ve(this.$apollo,"skipAllQueries",n.$skipAllQueries,n.$deep),ve(this.$apollo,"skipAllSubscriptions",n.$skipAllSubscriptions,n.$deep),ve(this.$apollo,"client",n.$client,n.$deep),ve(this.$apollo,"loadingKey",n.$loadingKey,n.$deep),ve(this.$apollo,"error",n.$error,n.$deep),ve(this.$apollo,"watchLoading",n.$watchLoading,n.$deep),Object.defineProperty(this,"$apolloData",{get:function(){return t.$data.$apolloData},enumerable:!0,configurable:!0}),n)if("$"!==r.charAt(0)){var i=n[r],o=this.$apollo.addSmartQuery(r,i);this.$isServer&&(!1===(i=k(i,this)).prefetch||!1===n.$prefetch||o.skip||this.$_apolloPromises.push(o.firstRun))}if(n.subscribe&&m.Vue.util.warn("vue-apollo -> `subscribe` option is deprecated. 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+var VueApollo=function(t){"use strict";function i(t){return(i="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t})(t)}function a(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}function r(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}function n(t,e,n){return e&&r(t.prototype,e),n&&r(t,n),t}function s(t,e,n){return e in t?Object.defineProperty(t,e,{value:n,enumerable:!0,configurable:!0,writable:!0}):t[e]=n,t}function l(e){for(var t=1;t<arguments.length;t++){var n=null!=arguments[t]?arguments[t]:{},r=Object.keys(n);"function"==typeof Object.getOwnPropertySymbols&&(r=r.concat(Object.getOwnPropertySymbols(n).filter(function(t){return Object.getOwnPropertyDescriptor(n,t).enumerable}))),r.forEach(function(t){s(e,t,n[t])})}return e}function e(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function");t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,writable:!0,configurable:!0}}),e&&o(t,e)}function u(t){return(u=Object.setPrototypeOf?Object.getPrototypeOf:function(t){return t.__proto__||Object.getPrototypeOf(t)})(t)}function o(t,e){return(o=Object.setPrototypeOf||function(t,e){return t.__proto__=e,t})(t,e)}function c(t){if(void 0===t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return t}function h(t,e){return!e||"object"!=typeof e&&"function"!=typeof e?c(t):e}function f(t,e,n){return(f="undefined"!=typeof Reflect&&Reflect.get?Reflect.get:function(t,e,n){var r=function(t,e){for(;!Object.prototype.hasOwnProperty.call(t,e)&&null!==(t=u(t)););return t}(t,e);if(r){var i=Object.getOwnPropertyDescriptor(r,e);return i.get?i.get.call(n):i.value}})(t,e,n||t)}function p(t,e){return function(t){if(Array.isArray(t))return t}(t)||function(t,e){var n=[],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done)&&(n.push(a.value),!e||n.length!==e);r=!0);}catch(t){i=!0,o=t}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}(t,e)||function(){throw new TypeError("Invalid attempt to destructure non-iterable instance")}()}function d(t){return function(t){if(Array.isArray(t)){for(var e=0,n=new Array(t.length);e<t.length;e++)n[e]=t[e];return n}}(t)||function(t){if(Symbol.iterator in Object(t)||"[object Arguments]"===Object.prototype.toString.call(t))return Array.from(t)}(t)||function(){throw new TypeError("Invalid attempt to spread non-iterable instance")}()}function v(i,o,a,s){var u,c=!1,l=0;function h(){u&&clearTimeout(u)}function t(){var t=this,e=Date.now()-l,n=arguments;function r(){l=Date.now(),a.apply(t,n)}c||(s&&!u&&r(),h(),void 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t[r]=i,t},{})},e.addGqlError=function(t){t.graphQLErrors&&t.graphQLErrors.length&&(t.gqlError=t.graphQLErrors[0])},e.noop=function(){}}(y={exports:{}},y.exports),y.exports),m=E.Globals,g=E.throttle,N=E.debounce,k=(E.getMergedDefinition,E.reapply),A=E.omit,O=E.addGqlError,I=(E.noop,function(){function i(t,e,n){var r=!(3<arguments.length&&void 0!==arguments[3])||arguments[3];a(this,i),s(this,"type",null),s(this,"vueApolloSpecialKeys",[]),this.vm=t,this.key=e,this.initialOptions=n,this.options=Object.assign({},n),this._skip=!1,this._watchers=[],this._destroyed=!1,r&&this.autostart()}return n(i,[{key:"autostart",value:function(){"function"==typeof this.options.skip?this._skipWatcher=this.vm.$watch(this.options.skip.bind(this.vm),this.skipChanged.bind(this),{immediate:!0,deep:this.options.deep}):this.options.skip?this._skip=!0:this.start()}},{key:"skipChanged",value:function(t,e){t!==e&&(this.skip=t)}},{key:"refresh",value:function(){this._skip||(this.stop(),this.start())}},{key:"start",value:function(){var e=this;if(this.starting=!0,"function"==typeof this.initialOptions.query){var t=this.initialOptions.query.bind(this.vm);this.options.query=t(),this._watchers.push(this.vm.$watch(t,function(t){e.options.query=t,e.refresh()},{deep:this.options.deep}))}if("function"==typeof this.initialOptions.document){var n=this.initialOptions.document.bind(this.vm);this.options.document=n(),this._watchers.push(this.vm.$watch(n,function(t){e.options.document=t,e.refresh()},{deep:this.options.deep}))}if("function"==typeof this.initialOptions.context){var r=this.initialOptions.context.bind(this.vm);this.options.context=r(),this._watchers.push(this.vm.$watch(r,function(t){e.options.context=t,e.refresh()},{deep:this.options.deep}))}if("function"==typeof this.options.variables){var i=this.executeApollo.bind(this);i=this.options.throttle?g(i,this.options.throttle):i,i=this.options.debounce?N(i,this.options.debounce):i,this._watchers.push(this.vm.$watch(function(){return e.options.variables.call(e.vm)},i,{immediate:!0,deep:this.options.deep}))}else this.executeApollo(this.options.variables)}},{key:"stop",value:function(){var t=!0,e=!1,n=void 0;try{for(var r,i=this._watchers[Symbol.iterator]();!(t=(r=i.next()).done);t=!0){(0,r.value)()}}catch(t){e=!0,n=t}finally{try{t||null==i.return||i.return()}finally{if(e)throw n}}this.sub&&(this.sub.unsubscribe(),this.sub=null)}},{key:"generateApolloOptions",value:function(t){var e=A(this.options,this.vueApolloSpecialKeys);return e.variables=t,e}},{key:"executeApollo",value:function(t){this.starting=!1}},{key:"nextResult",value:function(t){var e=t.error;e&&O(e)}},{key:"callHandlers",value:function(t){for(var e=!1,n=arguments.length,r=new Array(1<n?n-1:0),i=1;i<n;i++)r[i-1]=arguments[i];var o=!0,a=!1,s=void 0;try{for(var u,c=t[Symbol.iterator]();!(o=(u=c.next()).done);o=!0){var l=u.value;if(l){e=!0;var h=l.apply(this.vm,r);if(void 0!==h&&!h)break}}}catch(t){a=!0,s=t}finally{try{o||null==c.return||c.return()}finally{if(a)throw s}}return e}},{key:"errorHandler",value:function(){for(var t=arguments.length,e=new Array(t),n=0;n<t;n++)e[n]=arguments[n];return this.callHandlers.apply(this,[[this.options.error,this.vm.$apollo.error,this.vm.$apollo.provider.errorHandler]].concat(e))}},{key:"catchError",value:function(t){if(O(t),!this.errorHandler(t))if(t.graphQLErrors&&0!==t.graphQLErrors.length){console.error("GraphQL execution errors for ".concat(this.type," '").concat(this.key,"'"));var e=!0,n=!1,r=void 0;try{for(var i,o=t.graphQLErrors[Symbol.iterator]();!(e=(i=o.next()).done);e=!0){var a=i.value;console.error(a)}}catch(t){n=!0,r=t}finally{try{e||null==o.return||o.return()}finally{if(n)throw r}}}else if(t.networkError)console.error("Error sending the ".concat(this.type," '").concat(this.key,"'"),t.networkError);else{var s;if(console.error("[vue-apollo] An error has occurred for ".concat(this.type," '").concat(this.key,"'")),Array.isArray(t))(s=console).error.apply(s,d(t));else console.error(t)}}},{key:"destroy",value:function(){this._destroyed||(this._destroyed=!0,this.stop(),this._skipWatcher&&this._skipWatcher())}},{key:"skip",get:function(){return this._skip},set:function(t){t?this.stop():this.start(),this._skip=t}}]),i}()),T=["variables","watch","update","result","error","loadingKey","watchLoading","skip","throttle","debounce","subscribeToMore","prefetch","manual"],_=function(){function o(t,e,n){var r,i=!(3<arguments.length&&void 0!==arguments[3])||arguments[3];a(this,o),n.query||(n={query:n});return t.$data.$apolloData&&!t.$data.$apolloData.queries[e]&&t.$set(t.$data.$apolloData.queries,e,{loading:!1}),s(c(r=h(this,u(o).call(this,t,e,n,!1))),"type","query"),s(c(r),"vueApolloSpecialKeys",T),s(c(r),"_loading",!1),t.$isServer&&(r.firstRun=new Promise(function(t,e){r._firstRunResolve=t,r._firstRunReject=e})),r.vm.$isServer&&(r.options.fetchPolicy="network-only"),n.manual||(r.hasDataField=r.vm.$data.hasOwnProperty(e),r.hasDataField?Object.defineProperty(r.vm.$data.$apolloData.data,e,{get:function(){return r.vm.$data[e]},enumerable:!0,configurable:!0}):Object.defineProperty(r.vm.$data,e,{get:function(){return r.vm.$data.$apolloData.data[e]},enumerable:!0,configurable:!0})),i&&r.autostart(),r}return e(o,I),n(o,[{key:"stop",value:function(){f(u(o.prototype),"stop",this).call(this),this.loadingDone(),this.observer&&(this.observer.stopPolling(),this.observer=null)}},{key:"executeApollo",value:function(t){var e=JSON.stringify(t);if(this.sub){if(e===this.previousVariablesJson)return;this.sub.unsubscribe()}if(this.previousVariablesJson=e,this.observer=this.vm.$apollo.watchQuery(this.generateApolloOptions(t)),this.startQuerySubscription(),"no-cache"!==this.options.fetchPolicy){var n=this.maySetLoading();n.loading||this.nextResult(n)}f(u(o.prototype),"executeApollo",this).call(this,t)}},{key:"startQuerySubscription",value:function(){this.sub&&!this.sub.closed||(this.sub=this.observer.subscribe({next:this.nextResult.bind(this),error:this.catchError.bind(this)}))}},{key:"maySetLoading",value:function(t){var e=0<arguments.length&&void 0!==t&&t,n=this.observer.currentResult();return(e||n.loading)&&(this.loading||this.applyLoadingModifier(1),this.loading=!0),n}},{key:"nextResult",value:function(t){f(u(o.prototype),"nextResult",this).call(this,t);var e=t.data,n=t.loading;t.error&&this.firstRunReject(),n||this.loadingDone();var r="function"==typeof this.options.result;void 0===e||(this.options.manual?r||console.error("".concat(this.key," query must have a 'result' hook in manual mode")):"function"==typeof this.options.update?this.setData(this.options.update.call(this.vm,e)):void 0===e[this.key]&&Object.keys(e).length?console.error("Missing ".concat(this.key," attribute on result"),e):this.setData(e[this.key])),r&&this.options.result.call(this.vm,t,this.key)}},{key:"setData",value:function(t){this.vm.$set(this.hasDataField?this.vm.$data:this.vm.$data.$apolloData.data,this.key,t)}},{key:"catchError",value:function(t){f(u(o.prototype),"catchError",this).call(this,t),this.firstRunReject(),this.loadingDone(t),this.nextResult(this.observer.currentResult()),this.resubscribeToQuery()}},{key:"resubscribeToQuery",value:function(){var t=this.observer.getLastError(),e=this.observer.getLastResult();this.observer.resetLastResults(),this.startQuerySubscription(),Object.assign(this.observer,{lastError:t,lastResult:e})}},{key:"watchLoading",value:function(){for(var t=arguments.length,e=new Array(t),n=0;n<t;n++)e[n]=arguments[n];return this.callHandlers.apply(this,[[this.options.watchLoading,this.vm.$apollo.watchLoading,this.vm.$apollo.provider.watchLoading]].concat(e,[this]))}},{key:"applyLoadingModifier",value:function(t){var e=this.loadingKey;e&&"number"==typeof this.vm[e]&&(this.vm[e]+=t),this.watchLoading(1===t,t)}},{key:"loadingDone",value:function(t){var e=0<arguments.length&&void 0!==t?t:null;this.loading&&this.applyLoadingModifier(-1),this.loading=!1,e||this.firstRunResolve()}},{key:"fetchMore",value:function(){var t,e=this;if(this.observer)return this.maySetLoading(!0),(t=this.observer).fetchMore.apply(t,arguments).then(function(t){return t.loading||e.loadingDone(),t})}},{key:"subscribeToMore",value:function(){var t;if(this.observer)return{unsubscribe:(t=this.observer).subscribeToMore.apply(t,arguments)}}},{key:"refetch",value:function(t){var e=this;if(t&&(this.options.variables=t),this.observer){var n=this.observer.refetch(t).then(function(t){return t.loading||e.loadingDone(),t});return this.maySetLoading(),n}}},{key:"setVariables",value:function(t,e){if(this.options.variables=t,this.observer){var n=this.observer.setVariables(t,e);return this.maySetLoading(),n}}},{key:"setOptions",value:function(t){if(Object.assign(this.options,t),this.observer){var e=this.observer.setOptions(t);return this.maySetLoading(),e}}},{key:"startPolling",value:function(){var t;if(this.observer)return(t=this.observer).startPolling.apply(t,arguments)}},{key:"stopPolling",value:function(){var t;if(this.observer)return(t=this.observer).stopPolling.apply(t,arguments)}},{key:"firstRunResolve",value:function(){this._firstRunResolve&&(this._firstRunResolve(),this._firstRunResolve=null)}},{key:"firstRunReject",value:function(t){this._firstRunReject&&(this._firstRunReject(t),this._firstRunReject=null)}},{key:"destroy",value:function(){f(u(o.prototype),"destroy",this).call(this),this.loading&&this.watchLoading(!1,-1),this.loading=!1}},{key:"client",get:function(){return this.vm.$apollo.getClient(this.options)}},{key:"loading",get:function(){return this.vm.$data.$apolloData&&this.vm.$data.$apolloData.queries[this.key]?this.vm.$data.$apolloData.queries[this.key].loading:this._loading},set:function(t){this._loading!==t&&(this._loading=t,this.vm.$data.$apolloData&&this.vm.$data.$apolloData.queries[this.key]&&(this.vm.$data.$apolloData.queries[this.key].loading=t,this.vm.$data.$apolloData.loading+=t?1:-1))}},{key:"loadingKey",get:function(){return 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e=this.$scopedSlots.default({result:this.result,times:this.times,query:this.$apollo.queries.query,isLoading:this.$apolloData.loading,gqlError:this.result&&this.result.error&&this.result.error.gqlError});return e=Array.isArray(e)?e.concat(this.$slots.default):[e].concat(this.$slots.default),this.tag?t(this.tag,e):e[0]}},le=0,he={name:"ApolloSubscribeToMore",inject:["getDollarApollo","getApolloQuery"],props:{document:{type:[Function,Object],required:!0},variables:{type:Object,default:void 0},updateQuery:{type:Function,default:void 0}},watch:{document:"refresh",variables:"refresh"},created:function(){this.$_key="sub_component_".concat(le++)},mounted:function(){this.refresh()},beforeDestroy:function(){this.destroy()},methods:{destroy:function(){this.$_sub&&this.$_sub.destroy()},refresh:function(){this.destroy();var t=this.document;"function"==typeof t&&(t=t(ue)),this.$_sub=this.getDollarApollo().addSmartSubscription(this.$_key,{document:t,variables:this.variables,updateQuery:this.updateQuery,linkedQuery:this.getApolloQuery()})}},render:function(t){return null}},fe={props:{mutation:{type:[Function,Object],required:!0},variables:{type:Object,default:void 0},optimisticResponse:{type:Object,default:void 0},update:{type:Function,default:void 0},refetchQueries:{type:Function,default:void 0},clientId:{type:String,default:void 0},tag:{type:String,default:"div"}},data:function(){return{loading:!1,error:null}},watch:{loading:function(t){this.$emit("loading",t)}},methods:{mutate:function(t){var e=this;this.loading=!0,this.error=null;var n=this.mutation;"function"==typeof n&&(n=n(ue)),this.$apollo.mutate(l({mutation:n,client:this.clientId,variables:this.variables,optimisticResponse:this.optimisticResponse,update:this.update,refetchQueries:this.refetchQueries},t)).then(function(t){e.$emit("done",t),e.loading=!1}).catch(function(t){O(t),e.error=t,e.$emit("error",t),e.loading=!1})}},render:function(t){var e=this.$scopedSlots.default({mutate:this.mutate,loading:this.loading,error:this.error,gqlError:this.error&&this.error.gqlError});return e=Array.isArray(e)?e.concat(this.$slots.default):[e].concat(this.$slots.default),this.tag?t(this.tag,e):e[0]}};function pe(t,e){return void 0!==t&&Object.prototype.hasOwnProperty.call(t,e)}function de(){var t=this.$options,e=t.apolloProvider;if(e)this.$apolloProvider="function"==typeof e?e():e;else if(t.parent&&t.parent.$apolloProvider)this.$apolloProvider=t.parent.$apolloProvider;else if(t.provide){var n="function"==typeof t.provide?t.provide.call(this):t.provide;n&&n.$apolloProvider&&(this.$apolloProvider=n.$apolloProvider)}}function ve(){var t=this,e=this.$apolloProvider;if(!this._apolloLaunched&&e){this._apolloLaunched=!0;var n=this.$options.apollo;if(n){for(var r in this.$_apolloPromises=[],n.$init||(n.$init=!0,e.defaultOptions&&(n=this.$options.apollo=Object.assign({},e.defaultOptions,n))),ye(this.$apollo,"skipAll",n.$skipAll,n.$deep),ye(this.$apollo,"skipAllQueries",n.$skipAllQueries,n.$deep),ye(this.$apollo,"skipAllSubscriptions",n.$skipAllSubscriptions,n.$deep),ye(this.$apollo,"client",n.$client,n.$deep),ye(this.$apollo,"loadingKey",n.$loadingKey,n.$deep),ye(this.$apollo,"error",n.$error,n.$deep),ye(this.$apollo,"watchLoading",n.$watchLoading,n.$deep),Object.defineProperty(this,"$apolloData",{get:function(){return t.$data.$apolloData},enumerable:!0,configurable:!0}),n)if("$"!==r.charAt(0)){var i=n[r],o=this.$apollo.addSmartQuery(r,i);this.$isServer&&(!1===(i=k(i,this)).prefetch||!1===n.$prefetch||o.skip||this.$_apolloPromises.push(o.firstRun))}if(n.subscribe&&m.Vue.util.warn("vue-apollo -> `subscribe` option is deprecated. Use the `$subscribe` option instead."),n.$subscribe)for(var a in n.$subscribe)this.$apollo.addSmartSubscription(a,n.$subscribe[a])}}}function ye(t,e,n,r){void 0!==n&&("function"==typeof n?t.defineReactiveSetter(e,n,r):t[e]=n)}function be(){this.$_apollo&&(this.$_apollo.destroy(),this.$_apollo=null)}function Ee(t,e){t.mixin(l({},"1"===e?{init:de}:{},"2"===e?{data:function(){return{$apolloData:{queries:{},loading:0,data:this.$_apolloInitData}}},beforeCreate:function(){de.call(this),function(){var n=this;this.$_apolloInitData={};var t=this.$options.apollo;if(t){var e=function(e){"$"!==e.charAt(0)&&(t[e].manual||pe(n.$options.props,e)||pe(n.$options.computed,e)||pe(n.$options.methods,e)||Object.defineProperty(n,e,{get:function(){return n.$data.$apolloData.data[e]},set:function(t){return n.$_apolloInitData[e]=t},enumerable:!0,configurable:!0}))};for(var r in t)e(r)}}.call(this)},serverPrefetch:function(){if(this.$_apolloPromises)return Promise.all(this.$_apolloPromises)}}:{},{created:ve,destroyed:be}))}var me=["$subscribe"];function ge(t,e){if(!ge.installed){ge.installed=!0;var n=(m.Vue=t).version.substr(0,t.version.indexOf(".")),u=t.config.optionMergeStrategies.methods;t.config.optionMergeStrategies.apollo=function(t,e,n){if(!t)return e;if(!e)return t;for(var r=Object.assign({},A(t,me),t.data),i=Object.assign({},A(e,me),e.data),o={},a=0;a<me.length;a++){var s=me[a];o[s]=u(t[s],e[s])}return Object.assign(o,u(r,i))},Object.defineProperty(t.prototype,"$apollo",{get:function(){return this.$_apollo||(this.$_apollo=new R(this)),this.$_apollo}}),Ee(t,n),"2"===n&&(t.component("apollo-query",ce),t.component("ApolloQuery",ce),t.component("apollo-subscribe-to-more",he),t.component("ApolloSubscribeToMore",he),t.component("apollo-mutation",fe),t.component("ApolloMutation",fe))}}w.install=ge,w.version="3.0.0-rc.1";var Ne=w,ke=ce,Ae=he,Oe=fe,Ie=null;return"undefined"!=typeof window?Ie=window.Vue:"undefined"!=typeof global&&(Ie=global.Vue),Ie&&Ie.use(w),t.install=ge,t.ApolloProvider=Ne,t.ApolloQuery=ke,t.ApolloSubscribeToMore=Ae,t.ApolloMutation=Oe,t.default=w,t}({});
diff --git a/dist/vue-apollo.umd.js b/dist/vue-apollo.umd.js
index da7e84d..4b1d2ff 100644
--- a/dist/vue-apollo.umd.js
+++ b/dist/vue-apollo.umd.js
@@ -671,7 +671,7 @@
         } else if (error.networkError) {
           console.error("Error sending the ".concat(this.type, " '").concat(this.key, "'"), error.networkError);
         } else {
-          console.error("[vue-apollo] An error has occured for ".concat(this.type, " '").concat(this.key, "'"));
+          console.error("[vue-apollo] An error has occurred for ".concat(this.type, " '").concat(this.key, "'"));
 
           if (Array.isArray(error)) {
             var _console;
@@ -1519,7 +1519,7 @@
     if (value) {
       var customInspectFn = getCustomFn(value);
 
-      if (customInspectFn) {
+      if (customInspectFn !== undefined) {
         // $FlowFixMe(>=0.90.0)
         var customValue = customInspectFn.call(value); // check for infinite recursion
 
@@ -1639,8 +1639,10 @@
    * 
    */
   function invariant(condition, message) {
+    var booleanCondition = Boolean(condition);
     /* istanbul ignore else */
-    if (!condition) {
+
+    if (!booleanCondition) {
       throw new Error(message);
     }
   }
@@ -1878,14 +1880,14 @@
     return whitespace(len - str.length) + str;
   }
 
+  function _typeof$2(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof$2 = function _typeof(obj) { return typeof obj; }; } else { _typeof$2 = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof$2(obj); }
   /**
-   * Copyright (c) Facebook, Inc. and its affiliates.
-   *
-   * This source code is licensed under the MIT license found in the
-   * LICENSE file in the root directory of this source tree.
-   *
-   * 
+   * A GraphQLError describes an Error found during the parse, validate, or
+   * execute phases of performing a GraphQL operation. In addition to a message
+   * and stack trace, it also includes information about the locations in a
+   * GraphQL document and/or execution result that correspond to the Error.
    */
+
   function GraphQLError( // eslint-disable-line no-redeclare
   message, nodes, source, positions, path, originalError, extensions) {
     // Compute list of blame nodes.
@@ -1931,7 +1933,15 @@
       }, []);
     }
 
-    var _extensions = extensions || originalError && originalError.extensions;
+    var _extensions = extensions;
+
+    if (_extensions == null && originalError != null) {
+      var originalExtensions = originalError.extensions;
+
+      if (originalExtensions != null && _typeof$2(originalExtensions) === 'object') {
+        _extensions = originalExtensions;
+      }
+    }
 
     Object.defineProperties(this, {
       message: {
@@ -2076,24 +2086,11 @@
     // Expand a block string's raw value into independent lines.
     var lines = rawString.split(/\r\n|[\n\r]/g); // Remove common indentation from all lines but first.
 
-    var commonIndent = null;
+    var commonIndent = getBlockStringIndentation(lines);
 
-    for (var i = 1; i < lines.length; i++) {
-      var line = lines[i];
-      var indent = leadingWhitespace(line);
-
-      if (indent < line.length && (commonIndent === null || indent < commonIndent)) {
-        commonIndent = indent;
-
-        if (commonIndent === 0) {
-          break;
-        }
-      }
-    }
-
-    if (commonIndent) {
-      for (var _i = 1; _i < lines.length; _i++) {
-        lines[_i] = lines[_i].slice(commonIndent);
+    if (commonIndent !== 0) {
+      for (var i = 1; i < lines.length; i++) {
+        lines[i] = lines[i].slice(commonIndent);
       }
     } // Remove leading and trailing blank lines.
 
@@ -2108,6 +2105,29 @@
 
 
     return lines.join('\n');
+  } // @internal
+
+  function getBlockStringIndentation(lines) {
+    var commonIndent = null;
+
+    for (var i = 1; i < lines.length; i++) {
+      var line = lines[i];
+      var indent = leadingWhitespace(line);
+
+      if (indent === line.length) {
+        continue; // skip empty lines
+      }
+
+      if (commonIndent === null || indent < commonIndent) {
+        commonIndent = indent;
+
+        if (commonIndent === 0) {
+          break;
+        }
+      }
+    }
+
+    return commonIndent === null ? 0 : commonIndent;
   }
 
   function leadingWhitespace(str) {
@@ -2207,13 +2227,10 @@
     BLOCK_STRING: 'BlockString',
     COMMENT: 'Comment'
   });
-  /**
-   * The enum type representing the token kinds values.
-   */
-
   /**
    * A helper function to describe a token as a string for debugging
    */
+
   function getTokenDesc(token) {
     var value = token.value;
     return value ? "".concat(token.kind, " \"").concat(value, "\"") : token.kind;
@@ -2637,17 +2654,19 @@
             break;
 
           case 117:
-            // u
-            var charCode = uniCharCode(body.charCodeAt(position + 1), body.charCodeAt(position + 2), body.charCodeAt(position + 3), body.charCodeAt(position + 4));
+            {
+              // uXXXX
+              var charCode = uniCharCode(body.charCodeAt(position + 1), body.charCodeAt(position + 2), body.charCodeAt(position + 3), body.charCodeAt(position + 4));
 
-            if (charCode < 0) {
-              throw syntaxError(source, position, 'Invalid character escape sequence: ' + "\\u".concat(body.slice(position + 1, position + 5), "."));
+              if (charCode < 0) {
+                throw syntaxError(source, position, 'Invalid character escape sequence: ' + "\\u".concat(body.slice(position + 1, position + 5), "."));
+              }
+
+              value += String.fromCharCode(charCode);
+              position += 4;
+              break;
             }
 
-            value += String.fromCharCode(charCode);
-            position += 4;
-            break;
-
           default:
             throw syntaxError(source, position, "Invalid character escape sequence: \\".concat(String.fromCharCode(code), "."));
         }
@@ -4225,7 +4244,7 @@
     var start = lexer.token;
     var name = parseName(lexer);
 
-    if (DirectiveLocation.hasOwnProperty(name.value)) {
+    if (DirectiveLocation[name.value] !== undefined) {
       return name;
     }
 
@@ -4710,7 +4729,7 @@
             _result = Object.assign({}, _result);
 
             if (errors && errors.length) {
-              error = new Error("Apollo errors occured (".concat(errors.length, ")"));
+              error = new Error("Apollo errors occurred (".concat(errors.length, ")"));
               error.graphQLErrors = errors;
             }
 
@@ -5138,7 +5157,7 @@
   }
   ApolloProvider.install = install; // eslint-disable-next-line no-undef
 
-  ApolloProvider.version = "3.0.0-beta.30"; // Apollo provider
+  ApolloProvider.version = "3.0.0-rc.1"; // Apollo provider
 
   var ApolloProvider$1 = ApolloProvider; // Components
 
diff --git a/package.json b/package.json
index 0c18ee4..adf7d77 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-apollo",
-  "version": "3.0.0-beta.30",
+  "version": "3.0.0-rc.1",
   "description": "Use Apollo and GraphQL with Vue.js",
   "main": "dist/vue-apollo.umd.js",
   "module": "dist/vue-apollo.esm.js",