gdb 20000610 crashes

[Andre Bleau]

When the program run in the last version of gdb generates an exception gdb 
itself crashes. Example:

/* Bogus C example to show gdb crashing */
#include <stdio.h>
int main()
{
char* null = NULL;
printf("null[0]=%c\n", null[0]);
return 0;
}

compiled with: gcc -g crash.c -o crash

Running the program in gdb crashes gdb itself when the printf line is executed:

* Source Display *:gdb.exe - Application Error
The instruction at "0x77f8aa57"referenced memory at "0x00000034". The 
memory could not be "read".

gdb --version shows:
GNU gdb 4.17.gnat.3.12p

This is with the latest cygwin release under Windows 2000. Output from
cygcheck -s gdb:

Found: C:\cygwin\bin\gdb.exe
Found: c:\GNAT\BIN\gdb.exe
C:\cygwin\bin\gdb.exe
   C:\cygwin\bin\cygitcl30.dll
     C:\cygwin\bin\cygtcl80.dll
       C:\cygwin\bin\cygwin1.dll
         C:\WINNT\System32\KERNEL32.dll
           C:\WINNT\System32\NTDLL.DLL
       C:\WINNT\System32\USER32.dll
         C:\WINNT\System32\GDI32.DLL
   C:\cygwin\bin\cygitk30.dll
     C:\cygwin\bin\cygtk80.dll
       C:\WINNT\System32\COMDLG32.DLL
         C:\WINNT\System32\SHLWAPI.DLL
           C:\WINNT\System32\ADVAPI32.DLL
             C:\WINNT\System32\RPCRT4.DLL
         C:\WINNT\System32\COMCTL32.DLL
         C:\WINNT\System32\SHELL32.DLL
         C:\WINNT\System32\MSVCRT.DLL
   C:\cygwin\bin\tix4180.dll


Cygnus Win95/NT Configuration Diagnostics
Current System Time: Thu Jun 22 14:27:41 2000

WinNT Ver 5.0 build 2195

Path:   /usr/bin
         /usr/local/bin
         /usr/bin
         /c/GNAT/BIN
         /c/WINNT/SYSTEM32
         /c/WINNT
         /c/WINNT/SYSTEM32/WBEM

SysDir: C:\WINNT\System32
WinDir: C:\WINNT

MAKE_MODE = `unix'
PWD = `/d/Software/src'

Use `-r' to scan registry

a:  fd           N/A    N/A
c:  hd  NTFS    4094Mb  76% CP CS UN PA FC     System
d:  hd  NTFS    5679Mb  13% CP CS UN PA FC     Data
e:  cd           N/A    N/A
z:  net NTFS   13515Mb   5% CP CS UN PA FC

C:\cygwin\bin  /usr/bin  user    binmode
C:\cygwin\lib  /usr/lib  user    binmode
C:\cygwin  /        user    binmode
d:\temp  /tmp     system  binmode
c:    /c       user    textmode
d:    /d       user    textmode

Found: C:\cygwin\bin\bash.exe
Found: C:\cygwin\bin\cat.exe
Found: C:\cygwin\bin\cpp.exe
Found: C:\cygwin\bin\find.exe
Found: C:\cygwin\bin\gcc.exe
Found: c:\GNAT\BIN\gcc.exe
Found: C:\cygwin\bin\gdb.exe
Found: c:\GNAT\BIN\gdb.exe
Found: C:\cygwin\bin\ld.exe
Found: c:\GNAT\BIN\ld.exe
Found: C:\cygwin\bin\ls.exe
Found: C:\cygwin\bin\make.exe
Found: c:\GNAT\BIN\make.exe
Found: C:\cygwin\bin\sh.exe

    83k 2000/06/11 C:\cygwin\bin\cygitcl30.dll
    35k 2000/06/11 C:\cygwin\bin\cygitk30.dll
   402k 2000/06/11 C:\cygwin\bin\cygtcl80.dll
   474k 1999/09/14 C:\cygwin\bin\cygtcl80_20000415.dll
     5k 2000/06/11 C:\cygwin\bin\cygtclpip80.dll
    10k 2000/06/11 C:\cygwin\bin\cygtclreg80.dll
   639k 2000/06/11 C:\cygwin\bin\cygtk80.dll
   575k 2000/06/07 C:\cygwin\bin\cygwin1.dll
    83k 2000/06/11 C:\cygwin\bin\cygitcl30.dll
    35k 2000/06/11 C:\cygwin\bin\cygitk30.dll
   402k 2000/06/11 C:\cygwin\bin\cygtcl80.dll
   474k 1999/09/14 C:\cygwin\bin\cygtcl80_20000415.dll
     5k 2000/06/11 C:\cygwin\bin\cygtclpip80.dll
    10k 2000/06/11 C:\cygwin\bin\cygtclreg80.dll
   639k 2000/06/11 C:\cygwin\bin\cygtk80.dll
   575k 2000/06/07 C:\cygwin\bin\cygwin1.dll
Use -h to see help about each section

André Bleau, ing., analyste
bleau@courriel.polymtl.ca

Département de génie électrique et         Electric Engineering and
de génie informatique                      Computer Engineering department
École Polytechnique de Montréal            Montreal Polytechnic School


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