From 94a5c39e11fed94bfbc2cb32cf576d438402d250 Mon Sep 17 00:00:00 2001
From: Julien Couvreur <jcouv@users.noreply.github.com>
Date: Tue, 14 Nov 2017 15:14:18 -0800
Subject: [PATCH] Restore guard in ProcessMethodBody (#22990)

---
 src/Compilers/Core/Portable/PEWriter/ReferenceIndexer.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Compilers/Core/Portable/PEWriter/ReferenceIndexer.cs b/src/Compilers/Core/Portable/PEWriter/ReferenceIndexer.cs
index b0f12a11c3b..83cdf60c95a 100644
--- a/src/Compilers/Core/Portable/PEWriter/ReferenceIndexer.cs
+++ b/src/Compilers/Core/Portable/PEWriter/ReferenceIndexer.cs
@@ -119,6 +119,10 @@ protected override void ProcessMethodBody(IMethodDefinition method)
                         }
                     }
                 }
+                else if (!metadataWriter.MetadataOnly)
+                {
+                    throw ExceptionUtilities.Unreachable;
+                }
             }
         }
 
-- 
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