[PATCH] D125059: [Lex] Don't assert when decoding invalid UCNs.

[Sam McCall via Phabricator via cfe-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
sammccall marked an inline comment as done.
Closed by commit rG817550919e78: [Lex] Don't assert when decoding invalid UCNs. (authored by sammccall).

Changed prior to commit:
  https://reviews.llvm.org/D125059?vs=427494&id=427534#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125059/new/

https://reviews.llvm.org/D125059

Files:
  clang/lib/Lex/LiteralSupport.cpp
  clang/test/Lexer/unicode.c


Index: clang/test/Lexer/unicode.c
===================================================================
--- clang/test/Lexer/unicode.c
+++ clang/test/Lexer/unicode.c
@@ -28,6 +28,9 @@
 
         int _;
 
+extern int X\UAAAAAAAA; // expected-error {{not allowed in an identifier}}
+int Y = '\UAAAAAAAA'; // expected-error {{invalid universal character}}
+
 #ifdef __cplusplus
 
 extern int ༀ;
Index: clang/lib/Lex/LiteralSupport.cpp
===================================================================
--- clang/lib/Lex/LiteralSupport.cpp
+++ clang/lib/Lex/LiteralSupport.cpp
@@ -320,10 +320,8 @@
                             llvm::SmallVectorImpl<char> &Str) {
   char ResultBuf[4];
   char *ResultPtr = ResultBuf;
-  bool Res = llvm::ConvertCodePointToUTF8(Codepoint, ResultPtr);
-  (void)Res;
-  assert(Res && "Unexpected conversion failure");
-  Str.append(ResultBuf, ResultPtr);
+  if (llvm::ConvertCodePointToUTF8(Codepoint, ResultPtr))
+    Str.append(ResultBuf, ResultPtr);
 }
 
 void clang::expandUCNs(SmallVectorImpl<char> &Buf, StringRef Input) {


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