[Bug c/56910] New: Syntax error seemingly sneaks through gcc

[Bug c/56910] New: Syntax error seemingly sneaks through gcc

[daven at model dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56910

             Bug #: 56910
           Summary: Syntax error seemingly sneaks through gcc
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: daven@model.com


I'm not sure if the following code is triggering some obscure extension
to gcc or not, but it sure seems like it should generate a syntax
error (it does in all other compilers I've tried).

--- cut here (z.c) ---
typedef int int32_t;
typedef unsigned int uint32_t;

#include <stdio.h>

extern void vl_create_cell_reg(
    int32_t reg_idx,
    int32_t state_idx,
    uint32_t CR_flags,
    uint32_t init_val,
    char *name;  /* <--- this parameter is missing in the body and contains a
spurious ';' */
);

void vl_create_cell_reg( int32_t reg_idx, int32_t state_idx, uint32_t CR_flags,
uint32_t init_val )
{
}
--- cut here (end of z.c) ---

If I cut/paste this source to a file called "z.c", it compiles fine, i.e.:

$ gcc -c -Wall -Werror z.c
<< no errors/warnings reported >>

Note, if I remove the spurious ';', I get the expected error:

$ gcc -c -Wall -Werror z.c
z.c:15:6: error: conflicting types for ‘vl_create_cell_reg’
z.c:7:13: note: previous declaration of ‘vl_create_cell_reg’ was here
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/56911] New: [4.8 Regression] g++.dg/cpp0x/enum25.C:14:19: ICE: in finish_class_member_access_expr, at cp/typeck.c:2673 with -fpic
Date: Wed, 10 Apr 2013 17:28:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idV911

             Bug #: 56911
           Summary: [4.8 Regression] g++.dg/cpp0x/enum25.C:14:19: ICE: in
                    finish_class_member_access_expr, at cp/typeck.c:2673
                    with -fpic
    Classification: Unclassified
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ubizjak@gmail.com
            Target: x86_64-pc-linux-gnu


~/gcc-build-48/gcc/cc1plus -std=c++11 -fpic enum25.C
 int main()
enum25.C:14:19: internal compiler error: in finish_class_member_access_expr, at
cp/typeck.c:2673
   if (a.b == a.B::Y)
                   ^
0x58655b finish_class_member_access_expr(tree_node*, tree_node*, bool, int)
        ../../gcc-svn/branches/gcc-4_8-branch/gcc/cp/typeck.c:2673
0x57317b cp_parser_postfix_dot_deref_expression
        ../../gcc-svn/branches/gcc-4_8-branch/gcc/cp/parser.c:6140
0x55cd50 cp_parser_postfix_expression
        ../../gcc-svn/branches/gcc-4_8-branch/gcc/cp/parser.c:5864
...

[Bug c/56910] Syntax error seemingly sneaks through gcc

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56910

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-04-11 12:38:45 UTC ---
$ gcc -c -pedantic x.c
x.c:11:5: warning: ISO C forbids forward parameter declarations [-pedantic]

[Bug c/56910] Syntax error seemingly sneaks through gcc

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56910

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |mpolacek at gcc dot gnu.org
         Resolution|---                         |INVALID

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Nothing to do here.