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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/103137] [12 Regression] ICE in gfc_simplify_transpose,
 at fortran/simplify.c:8181
Date: Mon, 08 Nov 2021 20:50:03 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103137

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
                 CC|                            |anlauf at gcc dot gnu.org
   Last reconfirmed|                            |2021-11-08

--- Comment #1 from anlauf at gcc dot gnu.org ---
Naive patch:

diff --git a/gcc/fortran/simplify.c b/gcc/fortran/simplify.c
index d675f2c3aef..a4fe0c3366d 100644
--- a/gcc/fortran/simplify.c
+++ b/gcc/fortran/simplify.c
@@ -8174,6 +8177,9 @@ gfc_simplify_transpose (gfc_expr *matrix)

   gcc_assert (matrix->rank =3D=3D 2);

+  if (matrix->shape =3D=3D NULL)
+    return NULL;
+
   result =3D gfc_get_array_expr (matrix->ts.type, matrix->ts.kind,
                               &matrix->where);
   result->rank =3D 2;=