AST: Avoid reading an unitialized value

Desugar doesn't necessarily initialize ShouldAKA, but as of r241542 it
may read it. Fix the misuse of the API and initialize this before
passing it in.

Found by ubsan.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241705 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/AST/ASTDiagnostic.cpp b/lib/AST/ASTDiagnostic.cpp
index 68a58a517df605da4d82b148d522b52d3b626c7a..dddaa5af6fb088499cba97b15f8b17961731dbe9 100644 (file)
--- a/lib/AST/ASTDiagnostic.cpp
+++ b/lib/AST/ASTDiagnostic.cpp
@@ -192,8 +192,8 @@ ConvertTypeToDiagnosticString(ASTContext &Context, QualType Ty,
     if (CompareCanTy == CanTy)
       continue;  // Same canonical types
     std::string CompareS = CompareTy.getAsString(Context.getPrintingPolicy());
-    bool aka;
-    QualType CompareDesugar = Desugar(Context, CompareTy, aka);
+    bool ShouldAKA = false;
+    QualType CompareDesugar = Desugar(Context, CompareTy, ShouldAKA);
     std::string CompareDesugarStr =
         CompareDesugar.getAsString(Context.getPrintingPolicy());
     if (CompareS != S && CompareDesugarStr != S)