Re: cygwn 5.19 with X-win bootstrap

[djh]

Yes. It appears to be a Heisenbug.  But, the -O2 flushed it out again.
 
> Do we have a Heisenbug?
> 
> What happens if you build with CFLAGS="-gdwarf-2 -g3 -O2"?
> 

Again the backtrace didn't show much.  Does anyone wknow would to get a cygwin 
dll with debuggin information in it?

Regards
    Darel Henman

---------------- Result
Compiling /cygdrive/c/emacs/cvs/emacs/lisp/emacs-lisp/byte-opt.el
Fatal error (6)/bin/sh: line 1:  3712 Aborted       (core dumped) 
EMACSLOADPATH=/cygdrive/c/emacs/cvs/emacs/lisp ../src/bootstrap-emacs.exe 
-batch --no-site-file --multibyte -f batch-byte-compile-if-not-done $el
make[2]: *** [compile] Error 1
make[2]: Leaving directory `/cygdrive/c/emacs/cvs/emacs/lisp'


# doing it by hand with gdb
cd $e/cvs/emacs/src
export EMACSLOADPATH=/cygdrive/c/emacs/cvs/emacs/lisp
gdb ./bootstrap-emacs.exe
Starting program: /cygdrive/c/emacs/cvs/emacs/src/bootstrap-emacs.exe -batch 
--no-site-file --multibyte -f batch-byte-compile-if-not-done byte-opt.el
---Type <return> to continue, or q <return> to quit---  <RETURN>

Program received signal SIGSEGV, Segmentation fault.
0x610ad945 in pthread_mutexattr_init () from /usr/bin/cygwin1.dll
(gdb) backtrace
#0  0x610ad945 in pthread_mutexattr_init () from /usr/bin/cygwin1.dll
#1  0x6108dd7f in _sigfe () from /usr/bin/cygwin1.dll
#2  0x00000003 in ?? ()
#3  0x0022ee18 in ?? ()
#4  0x00000001 in ?? ()
#5  0x0022ee18 in ?? ()
#6  0x0022ee38 in ?? ()
#7  0x200a24d0 in main (argc=539893664, argv=0x4) at emacs.c:1062

Lisp Backtrace:
0x0 Lisp type 0
Cannot access memory at address 0x0

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