[Bug libstdc++/92057] New: variant converting constructor fails for primitives

[pj at patrickjohnston dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92057

            Bug ID: 92057
           Summary: variant converting constructor fails for primitives
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pj at patrickjohnston dot org
  Target Milestone: ---

Minimal testcase: https://wandbox.org/permlink/hzzjBrpCVZ4Cvwf8 (includes
output of gcc -v).

The problem did not exist in v9.2.0