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From: "muecker at gwdg dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/114361] New: ICE with c23 when creating mutually nested and
 compatible types with statement expressions
Date: Sat, 16 Mar 2024 08:48:12 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 14.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: muecker at gwdg dot de
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114361

            Bug ID: 114361
           Summary: ICE with c23 when creating mutually nested and
                    compatible types with statement expressions
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: muecker at gwdg dot de
  Target Milestone: ---

This fails in verify_type (goes away with -fchecking=3D0):

void f()
{
    typedef struct foo bar;
    typedef __typeof( ({ (struct foo { bar *x; }){ }; }) ) wuz;
    struct foo { wuz *x; };
}

https://godbolt.org/z/q7n5xbsc1=