[Bug preprocessor/12935] [3.3/3.4 regression] ICE with: -traditional -E and varargs

["dhazeghi at yahoo dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From dhazeghi at yahoo dot com  2003-12-11 01:45 -------
Here's the reduced testcase:

#define hidden_proto(name, attrs...);

with gcc 3.3, 3.3 branch and current mainline, compiling with -traditional -E yields:

bash-2.05b$ gcc -traditional -E foo.c 
# 1 "<built-in>"
# 1 "<command line>"
# 1 "foo.c"
foo.c:0: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


Works fine with gcc 3.2.3 making it a regression. Neil, could you take a look?

Under gdb:
Program received signal SIGSEGV, Segmentation fault.
0x0809b3de in _cpp_create_definition (pfile=0x8434800, node=0x4006734c)
    at ../../gcc-3.4-20031203/gcc/cppmacro.c:1517
1517    ../../gcc-3.4-20031203/gcc/cppmacro.c: No such file or directory.
        in ../../gcc-3.4-20031203/gcc/cppmacro.c
(gdb) bt
#0  0x0809b3de in _cpp_create_definition (pfile=0x8434800, node=0x4006734c)
    at ../../gcc-3.4-20031203/gcc/cppmacro.c:1517
#1  0x080963cb in do_define (pfile=0x8434800)
    at ../../gcc-3.4-20031203/gcc/cpplib.c:511
#2  0x08096109 in _cpp_handle_directive (pfile=0x8434800, indented=0)
    at ../../gcc-3.4-20031203/gcc/cpplib.c:421
#3  0x0809f33e in _cpp_scan_out_logical_line (pfile=0x8434800, macro=0x0)
    at ../../gcc-3.4-20031203/gcc/cpptrad.c:629
#4  0x0809f03d in _cpp_read_logical_line_trad (pfile=0x8434800)
    at ../../gcc-3.4-20031203/gcc/cpptrad.c:304
#5  0x08091e45 in scan_translation_unit_trad (pfile=0x8434800)
    at ../../gcc-3.4-20031203/gcc/c-ppoutput.c:187
#6  0x08091bf7 in preprocess_file (pfile=0x8434800)
    at ../../gcc-3.4-20031203/gcc/c-ppoutput.c:75
#7  0x0808aa0a in c_common_init () at ../../gcc-3.4-20031203/gcc/c-opts.c:1187
#8  0x08093e2e in c_objc_common_init ()
    at ../../gcc-3.4-20031203/gcc/c-objc-common.c:165
#9  0x08264002 in lang_dependent_init (name=0xbffffbb8 "foo.c")
    at ../../gcc-3.4-20031203/gcc/toplev.c:4470
#10 0x08264217 in do_compile () at ../../gcc-3.4-20031203/gcc/toplev.c:4581
#11 0x08264305 in toplev_main (argc=6, argv=0xbfffeea4)
    at ../../gcc-3.4-20031203/gcc/toplev.c:4630
#12 0x080a42d3 in main (argc=6, argv=0xbfffeea4)
    at ../../gcc-3.4-20031203/gcc/main.c:35
#13 0x420156a4 in __libc_start_main () from /lib/tls/libc.so.6

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |neil at daikokuya dot co dot
                   |                            |uk
           Severity|normal                      |critical
             Status|WAITING                     |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-12-11 01:45:35
               date|                            |
            Summary|internal compiler error     |[3.3/3.4 regression] ICE
                   |with: -traditional -E and   |with: -traditional -E and
                   |compiling sscanf.c from     |varargs
                   |glibc-2.3.2                 |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12935