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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug modula2/108553] New: GM2 ICEs on mistyped command line options
Date: Thu, 26 Jan 2023 08:29:19 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: modula2
X-Bugzilla-Version: 13.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: gaius at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108553

            Bug ID: 108553
           Summary: GM2 ICEs on mistyped command line options
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: modula2
          Assignee: gaius at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

When mistyping -Wreturn-type as -Wereturn-type the compiler ICEs because
we segfault in

#5  0x0000000000c19cfd in gm2_langhook_init_options (decoded_options_count=
=3D7,=20
    decoded_options=3D0x429a190)
    at /home/rguenther/src/trunk/gcc/m2/gm2-lang.cc:296
296                   fprintf(stderr, "%s : %s\n", opt, (arg ? arg : ""));
(gdb) l
291               /* FALLTHROUGH */
292             default:
293               if (code >=3D N_OPTS)
294                 {
295                   // FIXME remove debug.
296                   fprintf(stderr, "%s : %s\n", opt, (arg ? arg : ""));
297                   break;
298                 }
299               /* Do not pass Modula-2 args to the preprocessor, any tha=
t we
care
300                  about here should already have been handled above.  */
(gdb) p opt
$2 =3D 0x6874616d5f656661 <error: Cannot access memory at address
0x6874616d5f656661>

Note code is OPT_SPECIAL_unknown here.=