Fix a crash with qualified member access into a non-type, from Sean Hunt!

llvm-svn: 84370

3 files changed, 19 insertions, 0 deletions

diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index 6cea79a1b7a..bf2acfc06b9 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -383,6 +383,8 @@ def note_ambig_member_ref_object_type : Note<
   "lookup in the object type %0 refers here">;
 def note_ambig_member_ref_scope : Note<
   "lookup from the current scope refers here">;
+def err_qualified_member_nonclass : Error<
+  "qualified member access refers to a member in %0">;
 
 // C++ class members
 def err_storageclass_invalid_for_member : Error<
diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index b69e1fbcd6c..b32c6840192 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -2184,6 +2184,12 @@ Sema::BuildMemberReferenceExpr(Scope *S, ExprArg Base, SourceLocation OpLoc,
       // If the member name was a qualified-id, look into the
       // nested-name-specifier.
       DC = computeDeclContext(*SS, false);
+      
+      if (!isa<TypeDecl>(DC)) {
+        Diag(MemberLoc, diag::err_qualified_member_nonclass)
+          << DC << SS->getRange();
+        return ExprError();
+      }
 
       // FIXME: If DC is not computable, we should build a
       // CXXUnresolvedMemberExpr.
diff --git a/clang/test/SemaCXX/member-expr.cpp b/clang/test/SemaCXX/member-expr.cpp
index 28b1224d8d8..069f52605b9 100644
--- a/clang/test/SemaCXX/member-expr.cpp
+++ b/clang/test/SemaCXX/member-expr.cpp
@@ -31,3 +31,14 @@ int f0(B *b) {
   return b->f0->f0; // expected-error{{member reference base type 'struct A *()' is not a structure or union}} \
   // expected-note{{perhaps you meant to call this function}}
 }
+
+int i;
+
+namespace C {
+  int i;
+}
+
+void test2(X *xp) {
+  xp->::i = 7; // expected-error{{qualified member access refers to a member in the global namespace}}
+  xp->C::i = 7; // expected-error{{qualified member access refers to a member in namespace 'C'}}
+}