[Bug c++/78621] New: lambda mangling not ABI compliant

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78621

            Bug ID: 78621
           Summary: lambda mangling not ABI compliant
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nathan at gcc dot gnu.org
  Target Milestone: ---

bug 78252 exposes a bug in the mangler.  [](auto...) is mangled as-if that was
a template parameter reference (T[n]_), rather than auto (Da).  Refer to that
bug for test case.

Fix will need to pay attention to -fabi-version