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Date: Wed, 17 Feb 2010 07:51:05 -0800 (PST)
From: Ilguiz Latypov <ilatypov AT infradead DOT org>
Subject: a bug in a week old mmap
To: cygwin AT cygwin DOT com
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$ gdb --args perl -i -pe 's/\r//g' f.txt
GNU gdb 6.8.0.20080328-cvs (cygwin-special)
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...
(gdb) file /usr/bin/perl
Load new symbol table from "/usr/bin/perl"? (y or n) y
Reading symbols from /usr/bin/perl...done.
(gdb) run
Starting program: /usr/bin/perl -i -pe s/\\r//g f.txt
[New thread 4136.0x1514]
[New thread 4136.0x1214]

Program received signal SIGSEGV, Segmentation fault.
mmap_is_attached_or_noreserve (addr=0x4, len=1) at /c/work/cygwin/src/winsup/cygwin/mmap.cc:691
691       LIST_LOCK ();
Current language:  auto; currently c++
(gdb) bt
#0  mmap_is_attached_or_noreserve (addr=0x4, len=1) at /c/work/cygwin/src/winsup/cygwin/mmap.cc:691
#1  0x610296dc in _cygtls::handle_exceptions (e=0x33208, frame=0x82ce68, in=0x33224) at /c/work/cygwin/src/winsup/cygwin/exceptions.cc:559
#2  0x7c9032a8 in ntdll!RtlCopyOutOfProcessMemoryStreamTo () from /c/WINDOWS/system32/ntdll.dll
#3  0x00033208 in ?? ()
#4  0x0082ce68 in ?? ()
#5  0x00033224 in ?? ()
#6  0x000331dc in ?? ()
#7  0x0082ce68 in ?? ()
#8  0x7c9032bc in ntdll!RtlCopyOutOfProcessMemoryStreamTo () from /c/WINDOWS/system32/ntdll.dll
#9  0x0082ce68 in ?? ()
#10 0x000331f0 in ?? ()
#11 0x7c90327a in ntdll!RtlCopyOutOfProcessMemoryStreamTo () from /c/WINDOWS/system32/ntdll.dll
#12 0x00033208 in ?? ()
#13 0x0082ce68 in ?? ()
#14 0x00033224 in ?? ()
#15 0x000331dc in ?? ()
#16 0x61028d70 in sigignore () at /c/work/cygwin/src/winsup/cygwin/exceptions.cc:1114
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb) 

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