From 7b9294e06d18fd9979a2afe677c5519585a468a3 Mon Sep 17 00:00:00 2001
From: Neal Gafter <neal@gafter.com>
Date: Tue, 23 Feb 2016 15:32:17 -0800
Subject: [PATCH] Add assertion requested by @AlekseyTs

---
 .../VisualBasic/Portable/Compilation/MethodCompiler.vb          | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Compilers/VisualBasic/Portable/Compilation/MethodCompiler.vb b/src/Compilers/VisualBasic/Portable/Compilation/MethodCompiler.vb
index e3ba4b60c91..7edf987a6ce 100644
--- a/src/Compilers/VisualBasic/Portable/Compilation/MethodCompiler.vb
+++ b/src/Compilers/VisualBasic/Portable/Compilation/MethodCompiler.vb
@@ -1139,6 +1139,8 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
 
             _cancellationToken.ThrowIfCancellationRequested()
 
+            Debug.Assert(Not (method.IsPartial AndAlso method.PartialImplementationPart Is Nothing))
+
             Dim sourceMethod = TryCast(method, SourceMethodSymbol)
             'get cached diagnostics if not building and we have 'em
             If Not DoEmitPhase AndAlso (sourceMethod IsNot Nothing) Then
-- 
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