Do not try to instantiate invalid declarations. It's a recipe for
disaster. Fixes PR6161.
llvm-svn: 96371
diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 0b0efcb..f13bd69 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -1304,6 +1304,9 @@
Decl *Sema::SubstDecl(Decl *D, DeclContext *Owner,
const MultiLevelTemplateArgumentList &TemplateArgs) {
TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs);
+ if (D->isInvalidDecl())
+ return 0;
+
return Instantiator.Visit(D);
}