[Bug c++/93741] New: [10 regression] ICE in incomplete concept definition

[eric.niebler at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93741

            Bug ID: 93741
           Summary: [10 regression] ICE in incomplete concept definition
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: eric.niebler at gmail dot com
  Target Milestone: ---

The following (very invalid) code fragment causes gcc-trunk to ICE:


template <typename> struct a {          b({
  concept c =