From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Tue, 10 Oct 2017 13:56:17 +0000 (+0000)
Subject: Fix a (slightly weird) 'comma operator within array index expression' warning on... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b824f3553d2ae2210250301bdbeba48f860c1f30;p=clang

Fix a (slightly weird) 'comma operator within array index expression' warning on VS builds. NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@315314 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index 29051ebeef..82bf6e157b 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -5728,7 +5728,8 @@ void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
 
       // Preserve the property that the imaginary root file describes the
       // current state.
-      auto &T = Diag.DiagStatesByLoc.Files[FileID()].StateTransitions;
+      FileID NullFile;
+      auto &T = Diag.DiagStatesByLoc.Files[NullFile].StateTransitions;
       if (T.empty())
         T.push_back({CurState, 0});
       else