https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100142

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
     Ever confirmed|0                           |1
   Target Milestone|---                         |11.0
   Last reconfirmed|                            |2021-04-19
             Status|UNCONFIRMED                 |NEW
           Priority|P3                          |P1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  Seems to be a quite recent regression.

1001      location_t r = 
1002        linemap_position_for_line_and_column (set, map, line, column);
1003      if (linemap_assert_fails (r <= set->highest_location)
1004          || linemap_assert_fails (map == linemap_lookup (set, r)))
1005        return loc;

the map == linemap_lookup (set, r) part fails.

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