Fix use of uninitialized variable, found by ubsan selfhost.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236191 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Lex/Preprocessor.h b/include/clang/Lex/Preprocessor.h
index 09856529b7c7c79761f5420d95426562b868463e..8322e00260a494eee39d459998cda153a3cde581 100644 (file)
--- a/include/clang/Lex/Preprocessor.h
+++ b/include/clang/Lex/Preprocessor.h
@@ -367,7 +367,7 @@ class Preprocessor : public RefCountedBase<Preprocessor> {
   /// Information about a name that has been used to define a module macro.
   struct ModuleMacroInfo {
     ModuleMacroInfo(MacroDirective *MD)
-        : MD(MD), ActiveModuleMacrosGeneration(0) {}
+        : MD(MD), ActiveModuleMacrosGeneration(0), IsAmbiguous(false) {}
 
     /// The most recent macro directive for this identifier.
     MacroDirective *MD;