[Bug c++/68929] New: GCC hangs in nested template instantiations even after static_assert fails.

[eric at efcs dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68929

            Bug ID: 68929
           Summary: GCC hangs in nested template instantiations even after
                    static_assert fails.
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: eric at efcs dot ca
  Target Milestone: ---

GCC currently hangs when compiling the attached reproducer. The reproducer is a
stripped down libc++ test that ensures that  "std::make_integer_sequence<int,
-100>" causes a static assertion. 

GCC will emit the assertion but then continue to run and consume more memory
until its killed for being OOM.