gdb crashes when I try to set a breakpoint on 'main'
in a certain executable.

mopsy. rpm -q gdb
gdb-6.6-36.fc8


The source files are trivial:

mopsy. cat h.h
#define VALUE 5
mopsy. cat m.c
#include "h.h"
#include <stdio.h>

int main()
{
  printf ("%d\n", VALUE);
}


Compile with PCH and with -g3:

mopsy. gcc -g3 -o h.h.gch h.h
mopsy. gcc -g3 -I. -Winvalid-pch -o m m.c


Now debug 'm' and try "b main".  gdb crashes.

Program received signal SIGSEGV, Segmentation fault.
0x081072d4 in symbol_found (funfirstline=<value optimized out>, 
    canonical=0xbf8e6cc4, copy=0xbf8e69e0 "main", sym=0x9ba39d4, 
    file_symtab=0x0, sym_symtab=0x322e312e) at ../../gdb/linespec.c:2192
2192              if (lookup_block_symbol (b, copy, NULL, VAR_DOMAIN) != NULL)

#0  0x081072d4 in symbol_found (funfirstline=<value optimized out>, 
    canonical=0xbf8e6cc4, copy=0xbf8e69e0 "main", sym=0x9ba39d4, 
    file_symtab=0x0, sym_symtab=0x322e312e) at ../../gdb/linespec.c:2192
#1  0x081073b4 in decode_variable_1 (copy=0xbf8e69e0 "main", funfirstline=1, 
    canonical=0xbf8e6cc4, file_symtab=0x0) at ../../gdb/linespec.c:1998
#2  0x081098f8 in decode_line_1 (argptr=0xbf8e6c68, funfirstline=1, 
    default_symtab=0x0, default_line=0, canonical=0xbf8e6cc4, 
    not_found_ptr=0xbf8e6cc0) at ../../gdb/linespec.c:2062
#3  0x080d2afb in parse_breakpoint_sals (address=0xbf8e6c68, sals=0xbf8e6cb4, 
    addr_string=0xbf8e6cc4, not_found_ptr=0xbf8e6cc0)
    at ../../gdb/breakpoint.c:5260
#4  0x0811c2d2 in catch_exception (uiout=0x9b805d0, 
    func=0x80d2b50 <do_captured_parse_breakpoint>, func_args=0xbf8e6c98, 
    mask=6) at ../../gdb/exceptions.c:469
#5  0x080d85cc in break_command_1 (arg=0x9b4610e "", flag=0, 
    from_tty=163286116, pending_bp=0x0) at ../../gdb/breakpoint.c:5425
#6  0x0807ed63 in execute_command (p=0x9b4610d "n", from_tty=1)
    at ../../gdb/top.c:456
#7  0x0811fb0f in command_handler (command=0x9b46108 "b main")
    at ../../gdb/event-top.c:519
#8  0x08120711 in command_line_handler (rl=0x9b885b8 "")
    at ../../gdb/event-top.c:804
#9  0x005a7822 in rl_callback_read_char () at ../callback.c:205
#10 0x0811fceb in rl_callback_read_char_wrapper (client_data=0x0)
    at ../../gdb/event-top.c:179
#11 0x0811f65e in handle_file_event (event_file_desc=0)
    at ../../gdb/event-loop.c:730
#12 0x0811eb19 in process_event () at ../../gdb/event-loop.c:343
#13 0x0811f2e8 in gdb_do_one_event (data=0x0) at ../../gdb/event-loop.c:380
#14 0x0811c0b3 in catch_errors (func=0x811f1d0 <gdb_do_one_event>, 
    func_args=0x0, errstring=0x8235d09 "", mask=6)
    at ../../gdb/exceptions.c:515
#15 0x080c5474 in tui_command_loop (data=0x0) at ../../gdb/tui/tui-interp.c:151
#16 0x0811c55f in current_interp_command_loop () at ../../gdb/interps.c:278
#17 0x0807807b in captured_command_loop (data=0x0) at ../../gdb/main.c:101
#18 0x0811c0b3 in catch_errors (func=0x8078070 <captured_command_loop>, 
    func_args=0x0, errstring=0x8235d09 "", mask=6)
    at ../../gdb/exceptions.c:515
#19 0x08078828 in captured_main (data=0xbf8e7074) at ../../gdb/main.c:828
#20 0x0811c0b3 in catch_errors (func=0x80780b0 <captured_main>, 
    func_args=0xbf8e7074, errstring=0x8235d09 "", mask=6)
    at ../../gdb/exceptions.c:515
#21 0x08078061 in gdb_main (args=0xbf8e7074) at ../../gdb/main.c:837
#22 0x08078025 in main (argc=3, argv=0x9bb8c2c) at ../../gdb/gdb.c:35