[LLVMbugs] [Bug 16904] New: Crash when aliasing a template class that is a member of its template base class.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=16904

            Bug ID: 16904
           Summary: Crash when aliasing a template class that is a member
                    of its template base class.
           Product: clang
           Version: 3.3
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: cassio.neri at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11042
  --> http://llvm.org/bugs/attachment.cgi?id=11042&action=edit
run script for the code in the description.

The code below crashes clang 3.3 (coincidentaly, it also crashes gcc 4.8.1).
The associated run script is attached.

---------------------------------------------------------------------

template <typename T, typename U>
struct base {

  template <typename V>
  struct derived;

};

template <typename T, typename U>
template <typename V>
struct base<T, U>::derived : public base<T, V> {
};

// This (wrong?) alias declaration provoques the crash.
template <typename T, typename U, typename V>
using derived = base<T, U>::derived<V>;

// This one works:
// template <typename T, typename U, typename V>
// using derived = typename base<T, U>::template derived<V>;

template <typename T>
void f() {
  derived<T, bool, char> m{};
  (void) m;
}

int main() {
  f<int>();
}

---------------------------------------------------------------------

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