[Bug c++/66962] New: [concepts] overloaded function causing memory blow-up and ICE

[eric.niebler at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66962

            Bug ID: 66962
           Summary: [concepts] overloaded function causing memory blow-up
                    and ICE
           Product: gcc
           Version: c++-concepts
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: eric.niebler at gmail dot com
  Target Milestone: ---

Created attachment 36028
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36028&action=edit
preprocessed source

Compile with: g++ -std=gnu++1z -c iterator.i.cpp

Result:
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

It seems to have something to do with the iter_swap2 definition. Commenting out
those two functions makes the compile complete successfully (although IMO it
takes longer than it should, so we're probably already in trouble).