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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/103505] [9 Regression] ICE in compare_bound_mpz_t, at
 fortran/resolve.c:4587 since r8-7594-g078c5aff5ed83e9c
Date: Sun, 19 Dec 2021 21:00:46 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103505

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |12.0
            Summary|ICE in compare_bound_mpz_t, |[9 Regression] ICE in
                   |at fortran/resolve.c:4587   |compare_bound_mpz_t, at
                   |since                       |fortran/resolve.c:4587
                   |r8-7594-g078c5aff5ed83e9c   |since
                   |                            |r8-7594-g078c5aff5ed83e9c
      Known to fail|                            |9.4.1

--- Comment #14 from anlauf at gcc dot gnu.org ---
Fixed on mainline for gcc-12, and on 11- and 10-branch.

The patch applies cleanly to 9-branch.  However, it regresses on many
testcases.  Not sure how to fix this.

Marking as 9 regression.=