[Bug c/102797] New: ice in useless_type_conversion_p, at gimple-expr.c:87

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102797

            Bug ID: 102797
           Summary: ice in useless_type_conversion_p, at gimple-expr.c:87
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 51615
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51615&action=edit
gzipped C source code

For the attached C code, recent gcc trunk does this:

../src/plugins/task-lists-workspace/gtd-sidebar-list-row.c:264:1: internal
compiler error: tree check: expected class ‘type’, have ‘exceptional’
(error_mark) in useless_type_conversion_p, at gimple-expr.c:87

Flags -w -march=bdver2 -O2 -fexceptions required.

The bug first seems to occur between git hash be072bfa5bb38171
and 93d183a5fff92d80, so about 27 revisions.

I have a reduction running in the other window now.