From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id ACF79385702E; Fri, 9 Apr 2021 11:33:15 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org ACF79385702E From: "k.even-mendoza at imperial dot ac.uk" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/99990] New: Crash in GCC-11/gimplify Date: Fri, 09 Apr 2021 11:33:15 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 11.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: k.even-mendoza at imperial dot ac.uk X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Apr 2021 11:33:15 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99990 Bug ID: 99990 Summary: Crash in GCC-11/gimplify Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: k.even-mendoza at imperial dot ac.uk Target Milestone: --- In Ubuntu 18, with GCC-11 (gcc (GCC) 11.0.1 20210317 (experimental)), when trying to compile this code: #include void a() { va_arg(0, long); void *b[] =3D 0; } GCC-11 crashed with this error: =3D=3D=3D /home/user42/data/gcc-csmith-0/gcc-install/bin/gcc=20 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c In file included from 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:1: 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c: In function =E2=80=98a=E2=80=99: 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:3:13: error: first argument to =E2=80=98va_arg=E2=80=99 not of type =E2=80=98va_list=E2=80=99 3 | va_arg(0, long); | ^~~~ 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:4:15: error: invalid initializer 4 | void *b[] =3D 0; | ^ In file included from 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:1: 934d08d3ee1bab940b2f2f2651e06ccaf8d82f87.c:3:13: internal compiler error: in gimplify_va_arg_expr, at gimplify.c:15594 3 | va_arg(0, long); | ^ 0x6b7b93 gimplify_va_arg_expr(tree_node**, gimple**, gimple**) .././../gcc-source/gcc/gimplify.c:15594 0xb8e839 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*= ), int) .././../gcc-source/gcc/gimplify.c:14156 0xb91416 gimplify_stmt(tree_node**, gimple**) .././../gcc-source/gcc/gimplify.c:6876 0xb8ecbb gimplify_statement_list .././../gcc-source/gcc/gimplify.c:1879 0xb8ecbb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*= ), int) .././../gcc-source/gcc/gimplify.c:14526 0xb91416 gimplify_stmt(tree_node**, gimple**) .././../gcc-source/gcc/gimplify.c:6876 0xb91bd1 gimplify_bind_expr .././../gcc-source/gcc/gimplify.c:1421 0xb8e1ee gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*= ), int) .././../gcc-source/gcc/gimplify.c:14283 0xba776f gimplify_stmt(tree_node**, gimple**) .././../gcc-source/gcc/gimplify.c:6876 0xba776f gimplify_body(tree_node*, bool) .././../gcc-source/gcc/gimplify.c:15318 0xba7b9d gimplify_function_tree(tree_node*) .././../gcc-source/gcc/gimplify.c:15472 0x9dc057 cgraph_node::analyze() .././../gcc-source/gcc/cgraphunit.c:670 0x9debb7 analyze_functions .././../gcc-source/gcc/cgraphunit.c:1236 0x9df81d symbol_table::finalize_compilation_unit() .././../gcc-source/gcc/cgraphunit.c:2514 Please submit a full bug report, =3D=3D=3D Before (gcc-10) it would just stop the compilation (with these two errors) = and exit without crashing.=