[Sema] Fix PR35832 - Ambiguity accessing anonymous struct/union with multiple bases.

Summary:
Currently clang doesn't do qualified lookup when building indirect field decl references. This causes ambiguity when the field is in a base class to which there are multiple valid paths  even though a qualified name is used.

For example:
```
class B {
protected:
 int i;
 union { int j; };
};

class X : public B { };
class Y : public B { };

class Z : public X, public Y {
 int a() { return X::i; } // works
 int b() { return X::j; } // fails
};
```

Reviewers: rsmith, aaron.ballman, rjmccall

Reviewed By: rjmccall

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D45411

llvm-svn: 329521

1 files changed, 0 insertions, 1 deletions

diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 1a35c9dbf7c..4de55506223 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -2239,7 +2239,6 @@ public:
       // We have a reference to an unnamed field.  This is always the
       // base of an anonymous struct/union member access, i.e. the
       // field is always of record type.
-      assert(!QualifierLoc && "Can't have an unnamed field with a qualifier!");
       assert(Member->getType()->isRecordType() &&
              "unnamed member not of record type?");