From 014bb61ffd61569c9276ffcbfcfa3cefc9e614e4 Mon Sep 17 00:00:00 2001
From: Oluwatoni Solarin-Sodara <toni.edward@outlook.com>
Date: Mon, 1 Apr 2019 11:11:04 +0100
Subject: [PATCH] check for backup symbol file before trying to restore

---
 src/coverlet.core/Helpers/InstrumentationHelper.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/coverlet.core/Helpers/InstrumentationHelper.cs b/src/coverlet.core/Helpers/InstrumentationHelper.cs
index 8e9bdc3..f06bbf7 100644
--- a/src/coverlet.core/Helpers/InstrumentationHelper.cs
+++ b/src/coverlet.core/Helpers/InstrumentationHelper.cs
@@ -109,8 +109,11 @@ namespace Coverlet.Core.Helpers
 
             RetryHelper.Retry(() =>
             {
-                File.Copy(backupSymbolPath, Path.ChangeExtension(module, ".pdb"), true);
-                File.Delete(backupSymbolPath);
+                if (File.Exists(backupSymbolPath))
+                {
+                    File.Copy(backupSymbolPath, Path.ChangeExtension(module, ".pdb"), true);
+                    File.Delete(backupSymbolPath);
+                }
             }, retryStrategy, 10);
         }