c++/4212: g++ 3.0.1 crashes when generating dwarf2 records for wxwindows quantize.cpp

[tim at fungible dot com]

>Number:         4212
>Category:       c++
>Synopsis:       g++ 3.0.1 crashes when generating dwarf2 records for wxwindows quantize.cpp
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 03 12:46:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     tim@fungible.com
>Release:        gcc 3.0.1
>Organization:
>Environment:
Linux Mandrake 6.1 or 6.5 or so.
>Description:
The following segfault happens on my machine.  The bug seems
quite sensitive; if I rename the source file from "quantize.cpp"
to "x.cpp", the problem goes away.  If I remove unused declarations
from early in quantize.cpp, the problem goes away.  Despite
its name, quantize.cpp is preprocessor output.  I have both
debug and non-debug builds of gcc 3.0.1 on my machine,
and the problem happens with both.

I have used this build of the compiler to compile numerous
other files successfully.

If you need me to ask the debugger some specific questions
at the failure point, let me know and I'll do it.

[tim@fungible /tmp]$ /home/tim/gcc-3.0.1-install/bin/g++ -v -c quantize.cpp -ggdb 
Reading specs from /home/tim/gcc-3.0.1-install/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/specs
Configured with: ../gcc-3.0.1/configure --prefix=/home/tim/gcc-3.0.1-install --enable-languages=c++ --enable-debug
Thread model: single
gcc version 3.0.1
 /home/tim/gcc-3.0.1-install/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=1 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ quantize.cpp -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase quantize.cpp -ggdb -version -o /tmp/ccI7pS87.s
GNU CPP version 3.0.1 (cpplib) (i386 Linux/ELF)
GNU C++ version 3.0.1 (i686-pc-linux-gnu)
	compiled by GNU C version 3.0.1.
ignoring nonexistent directory "/home/tim/gcc-3.0.1-install/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/tim/gcc-3.0.1-install/include/g++-v3
 /home/tim/gcc-3.0.1-install/include/g++-v3/i686-pc-linux-gnu
 /home/tim/gcc-3.0.1-install/include/g++-v3/backward
 /usr/local/include
 /home/tim/gcc-3.0.1-install/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/include
 /usr/include
End of search list.
quantize.cpp:7519: Internal error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
[tim@fungible /tmp]$ ~/gdb-5.0/gdb/gdb  /home/tim/gcc-3.0.1-install/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/cc1plus
GNU gdb 5.0
Copyright 2000 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...
(gdb) run  -v -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=1 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ quantize.cpp -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase quantize.cpp -ggdb -version -o /tmp/ccI7pS87.s
Starting program: /home/tim/gcc-3.0.1-install/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=1 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ quantize.cpp -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase quantize.cpp -ggdb -version -o /tmp/ccI7pS87.s
GNU CPP version 3.0.1 (cpplib) (i386 Linux/ELF)
GNU C++ version 3.0.1 (i686-pc-linux-gnu)
	compiled by GNU C version 3.0.1.
ignoring nonexistent directory "/home/tim/gcc-3.0.1-install/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/tim/gcc-3.0.1-install/include/g++-v3
 /home/tim/gcc-3.0.1-install/include/g++-v3/i686-pc-linux-gnu
 /home/tim/gcc-3.0.1-install/include/g++-v3/backward
 /usr/local/include
 /home/tim/gcc-3.0.1-install/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/include
 /usr/include
End of search list.

Program received signal SIGSEGV, Segmentation fault.
gen_type_die (type=0x40a3a000, context_die=0x83bb690)
    at ../../gcc-3.0.1/gcc/dwarf2out.c:3669
3669	  if (TREE_CODE (type) == ARRAY_TYPE)
(gdb) where
#0  gen_type_die (type=0x40a3a000, context_die=0x83bb690)
    at ../../gcc-3.0.1/gcc/dwarf2out.c:3669
#1  0x816e091 in retry_incomplete_types ()
    at ../../gcc-3.0.1/gcc/dwarf2out.c:9136
#2  0x81736d2 in dwarf2out_finish () at ../../gcc-3.0.1/gcc/dwarf2out.c:11288
#3  0x80d75d5 in compile_file (name=0xbffffc79 "quantize.cpp")
    at ../../gcc-3.0.1/gcc/toplev.c:2446
#4  0x80db4c6 in main (argc=36, argv=0xbffff974)
    at ../../gcc-3.0.1/gcc/toplev.c:4990
#5  0x400364ad in __libc_start_main () from /lib/libc.so.6
#6  0x815b0000 in ?? ()
Cannot access memory at address 0xe853
(gdb) p type
$1 = 0x40a3a000
(gdb) p *type
$2 = {common = {chain = 0x0, type = 0x0, code = LABEL_DECL, 
    side_effects_flag = 0, constant_flag = 0, addressable_flag = 1, 
    volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0, 
    asm_written_flag = 0, used_flag = 0, nothrow_flag = 0, static_flag = 0, 
    public_flag = 0, private_flag = 0, protected_flag = 0, bounded_flag = 0, 
    lang_flag_0 = 0, lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, 
    lang_flag_4 = 0, lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, int_cst = {
    common = {chain = 0x0, type = 0x0, code = LABEL_DECL, 
      side_effects_flag = 0, constant_flag = 0, addressable_flag = 1, 
      volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0, 
      asm_written_flag = 0, used_flag = 0, nothrow_flag = 0, static_flag = 0, 
      public_flag = 0, private_flag = 0, protected_flag = 0, bounded_flag = 0, 
      lang_flag_0 = 0, lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, 
      lang_flag_4 = 0, lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, 
    rtl = 0x83bf728, int_cst = {low = 6588, high = 39176}}, real_cst = {
    common = {chain = 0x0, type = 0x0, code = LABEL_DECL, 
      side_effects_flag = 0, constant_flag = 0, addressable_flag = 1, 
      volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0, 
      asm_written_flag = 0, used_flag = 0, nothrow_flag = 0, static_flag = 0, 
      public_flag = 0, private_flag = 0, protected_flag = 0, bounded_flag = 0, 
      lang_flag_0 = 0, lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, 
      lang_flag_4 = 0, lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, 
    rtl = 0x83bf728, real_cst = {r = {6588, 39176, 0, 0, 0}}}, string = {
    common = {chain = 0x0, type = 0x0, code = LABEL_DECL, 
      side_effects_flag = 0, constant_flag = 0, addressable_flag = 1, 
      volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0, 
      asm_written_flag = 0, used_flag = 0, nothrow_flag = 0, static_flag = 0, 
      public_flag = 0, private_flag = 0, protected_flag = 0, bounded_flag = 0, 
      lang_flag_0 = 0, lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, 
      lang_flag_4 = 0, lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, 
    rtl = 0x83bf728, length = 6588, 
    pointer = 0x9908 <Address 0x9908 out of bounds>}, complex = {common = {
      chain = 0x0, type = 0x0, code = LABEL_DECL, side_effects_flag = 0, 
      constant_flag = 0, addressable_flag = 1, volatile_flag = 0, 
      readonly_flag = 0, unsigned_flag = 0, asm_written_flag = 0, 
      used_flag = 0, nothrow_flag = 0, static_flag = 0, public_flag = 0, 
      private_flag = 0, protected_flag = 0, bounded_flag = 0, lang_flag_0 = 0, 
      lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, 
      lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, rtl = 0x83bf728, 
    real = 0x19bc, imag = 0x9908}, identifier = {common = {chain = 0x0, 
      type = 0x0, code = LABEL_DECL, side_effects_flag = 0, constant_flag = 0, 
      addressable_flag = 1, volatile_flag = 0, readonly_flag = 0, 
      unsigned_flag = 0, asm_written_flag = 0, used_flag = 0, 
      nothrow_flag = 0, static_flag = 0, public_flag = 0, private_flag = 0, 
      protected_flag = 0, bounded_flag = 0, lang_flag_0 = 0, lang_flag_1 = 0, 
      lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, lang_flag_5 = 0, 
      lang_flag_6 = 0, dummy = 0}, length = 138147624, 
    pointer = 0x19bc <Address 0x19bc out of bounds>}, decl = {common = {
      chain = 0x0, type = 0x0, code = LABEL_DECL, side_effects_flag = 0, 
      constant_flag = 0, addressable_flag = 1, volatile_flag = 0, 
      readonly_flag = 0, unsigned_flag = 0, asm_written_flag = 0, 
      used_flag = 0, nothrow_flag = 0, static_flag = 0, public_flag = 0, 
      private_flag = 0, protected_flag = 0, bounded_flag = 0, lang_flag_0 = 0, 
      lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, 
      lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, 
    filename = 0x83bf728 "quantize.cpp", linenum = 6588, uid = 39176, 
    size = 0x0, mode = VOIDmode, external_flag = 0, nonlocal_flag = 0, 
    regdecl_flag = 0, inline_flag = 0, bit_field_flag = 0, virtual_flag = 0, 
    ignored_flag = 0, abstract_flag = 0, in_system_header_flag = 0, 
    common_flag = 0, defer_output = 0, transparent_union = 0, 
    static_ctor_flag = 0, static_dtor_flag = 0, artificial_flag = 0, 
    weak_flag = 0, non_addr_const_p = 0, 
    no_instrument_function_entry_exit = 0, no_check_memory_usage = 0, 
    comdat_flag = 0, malloc_flag = 0, no_limit_stack = 0, 
    built_in_class = NOT_BUILT_IN, pure_flag = 0, pointer_depth = 0, 
    non_addressable = 0, user_align = 0, uninlinable = 0, lang_flag_0 = 0, 
    lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, 
    lang_flag_5 = 0, lang_flag_6 = 0, lang_flag_7 = 0, u1 = {f = BUILT_IN_ABS, 
      i = 1, a = {align = 1, off_align = 0}}, size_unit = 0x0, name = 0x0, 
    context = 0x402f3d00, arguments = 0x0, result = 0x0, initial = 0x4014d450, 
    abstract_origin = 0x0, assembler_name = 0x0, section_name = 0x0, 
    machine_attributes = 0x0, rtl = 0x40b911c0, live_range_rtl = 0x0, u2 = {
      f = 0x0, r = 0x0, t = 0x0, i = 0}, vindex = 0x0, pointer_alias_set = -1, 
    lang_specific = 0x0}, type = {common = {chain = 0x0, type = 0x0, 
      code = LABEL_DECL, side_effects_flag = 0, constant_flag = 0, 
      addressable_flag = 1, volatile_flag = 0, readonly_flag = 0, 
      unsigned_flag = 0, asm_written_flag = 0, used_flag = 0, 
      nothrow_flag = 0, static_flag = 0, public_flag = 0, private_flag = 0, 
      protected_flag = 0, bounded_flag = 0, lang_flag_0 = 0, lang_flag_1 = 0, 
      lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, lang_flag_5 = 0, 
      lang_flag_6 = 0, dummy = 0}, values = 0x83bf728, size = 0x19bc, 
    size_unit = 0x9908, attributes = 0x0, uid = 0, precision = 0, 
    mode = VOIDmode, string_flag = 0, no_force_blk_flag = 0, 
    needs_constructing_flag = 0, transparent_union_flag = 0, packed_flag = 0, 
    restrict_flag = 0, pointer_depth = 0, lang_flag_0 = 0, lang_flag_1 = 0, 
    lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, lang_flag_5 = 0, 
    lang_flag_6 = 0, user_align = 0, align = 1, pointer_to = 0x0, 
    reference_to = 0x0, symtab = {address = 1076837632, 
      pointer = 0x402f3d00 "\030Ö.@¸7/@\036@\006"}, name = 0x0, minval = 0x0, 
    maxval = 0x4014d450, next_variant = 0x0, main_variant = 0x0, binfo = 0x0, 
    noncopied_parts = 0x0, context = 0x40b911c0, alias_set = 0, 
    lang_specific = 0x0}, list = {common = {chain = 0x0, type = 0x0, 
      code = LABEL_DECL, side_effects_flag = 0, constant_flag = 0, 
      addressable_flag = 1, volatile_flag = 0, readonly_flag = 0, 
      unsigned_flag = 0, asm_written_flag = 0, used_flag = 0, 
      nothrow_flag = 0, static_flag = 0, public_flag = 0, private_flag = 0, 
      protected_flag = 0, bounded_flag = 0, lang_flag_0 = 0, lang_flag_1 = 0, 
      lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, lang_flag_5 = 0, 
      lang_flag_6 = 0, dummy = 0}, purpose = 0x83bf728, value = 0x19bc}, 
  vec = {common = {chain = 0x0, type = 0x0, code = LABEL_DECL, 
      side_effects_flag = 0, constant_flag = 0, addressable_flag = 1, 
      volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0, 
      asm_written_flag = 0, used_flag = 0, nothrow_flag = 0, static_flag = 0, 
      public_flag = 0, private_flag = 0, protected_flag = 0, bounded_flag = 0, 
      lang_flag_0 = 0, lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, 
      lang_flag_4 = 0, lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, 
    length = 138147624, a = {0x19bc}}, exp = {common = {chain = 0x0, 
      type = 0x0, code = LABEL_DECL, side_effects_flag = 0, constant_flag = 0, 
      addressable_flag = 1, volatile_flag = 0, readonly_flag = 0, 
      unsigned_flag = 0, asm_written_flag = 0, used_flag = 0, 
      nothrow_flag = 0, static_flag = 0, public_flag = 0, private_flag = 0, 
      protected_flag = 0, bounded_flag = 0, lang_flag_0 = 0, lang_flag_1 = 0, 
      lang_flag_2 = 0, lang_flag_3 = 0, lang_flag_4 = 0, lang_flag_5 = 0, 
      lang_flag_6 = 0, dummy = 0}, complexity = 138147624, operands = {
      0x19bc}}, block = {common = {chain = 0x0, type = 0x0, code = LABEL_DECL, 
      side_effects_flag = 0, constant_flag = 0, addressable_flag = 1, 
      volatile_flag = 0, readonly_flag = 0, unsigned_flag = 0, 
      asm_written_flag = 0, used_flag = 0, nothrow_flag = 0, static_flag = 0, 
      public_flag = 0, private_flag = 0, protected_flag = 0, bounded_flag = 0, 
      lang_flag_0 = 0, lang_flag_1 = 0, lang_flag_2 = 0, lang_flag_3 = 0, 
      lang_flag_4 = 0, lang_flag_5 = 0, lang_flag_6 = 0, dummy = 0}, 
    handler_block_flag = 0, abstract_flag = 0, block_num = 34536906, 
    vars = 0x19bc, subblocks = 0x9908, supercontext = 0x0, 
    abstract_origin = 0x0}}
(gdb) 
>How-To-Repeat:
As above.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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