Add an assertion to tell us when we're going off the deep end trying

to determine outer template arguments lists for template
parameters. This is actually the problem behind PR9643, which I have
yet to figure out how to fix.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131822 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Sema/SemaTemplateInstantiate.cpp b/lib/Sema/SemaTemplateInstantiate.cpp
index 564f099ad9fb7d1ed3f147454ca1504de57ceadf..907a7e24a912d04055d4eb7d06d757e20ba16661 100644 (file)
--- a/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/lib/Sema/SemaTemplateInstantiate.cpp
@@ -58,9 +58,13 @@ Sema::getTemplateInstantiationArgs(NamedDecl *D,
     Result.addOuterTemplateArguments(Innermost);
   
   DeclContext *Ctx = dyn_cast<DeclContext>(D);
-  if (!Ctx)
+  if (!Ctx) {
     Ctx = D->getDeclContext();
-
+    
+    assert((!D->isTemplateParameter() || !Ctx->isTranslationUnit()) &&
+           "Template parameter doesn't have its context yet!");
+  }
+  
   while (!Ctx->isFileContext()) {
     // Add template arguments from a class template instantiation.
     if (ClassTemplateSpecializationDecl *Spec