Hi,
In cases where ReleaseMacroInfo gets called and it doesn't cleanup
the Preprocessor's MIChainHead can lead to double deletion. I am sending
the patch that fixes the problem for me.
Vassil
diff --git a/lib/Lex/PPDirectives.cpp b/lib/Lex/PPDirectives.cpp
index 5f38387..1a9b5eb 100644
--- a/lib/Lex/PPDirectives.cpp
+++ b/lib/Lex/PPDirectives.cpp
@@ -94,6 +94,14 @@
Preprocessor::AllocateVisibilityMacroDirective(SourceLocation Loc,
/// error in the macro definition.
void Preprocessor::ReleaseMacroInfo(MacroInfo *MI) {
// Don't try to reuse the storage; this only happens on error paths.
+
+ // If this is on the macro info chain, avoid double deletion on teardown.
+ while (MacroInfoChain *I = MIChainHead) {
+ if (&(I->MI) == MI)
+ I->Next = (I->Next) ? I->Next->Next : 0;
+ MIChainHead = I->Next;
+ }
+
MI->~MacroInfo();
}
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