1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index b492d77691..7e6f7c1af6 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -671,7 +671,7 @@ static char DecodeTrigraphChar(const char *CP, Lexer *L) {
   }
 
   if (!L->isLexingRawMode())
-    L->Diag(CP-2, diag::trigraph_converted) << std::string()+Res;
+    L->Diag(CP-2, diag::trigraph_converted) << llvm::StringRef(&Res, 1);
   return Res;
 }