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1.3.12: bash reorders output


I'm running into an odd bug when I run a large script - it seems that the output from an external application remains stuck somewhere in a buffer, and thus data is reordered in a bash script.

<<<<<<< bash script.
func() {
echo "x"
external_prog < input_data.txt
echo "y"
}
func > result.txt
>>>>>>>>>>>>

The output of the script is
<<<
x
y
output_of_the_external_prog
<<<<<
instead of
<<<
x
output_of_the_external_prog
y
<<<

Has anyone seen such a behaviour before? Should I try other cygwin versions?
I've tried without success to create a simple test case - I can only reproduce it with a ~ 7 kB long script, if I remove (IMHO) unrelated lines, the bug disappears. The external program generates ~ 6 kb data. The complete size of result.txt is around 35 kB, i.e. there are 6 blocks that call the external program, and only in one case the output is reordered.

If I add "id > /dev/null" after the call of external_prog, then result.txt is correct.

Has anyone an idea what could cause that behaviour?
I can test patches, or just hints in which part of the cygwin sources I should start searching for the bug.

--
Manfred
Cygwin Win95/NT Configuration Diagnostics
Current System Time: Fri Aug 02 12:26:02 2002

Windows 2000 Professional Ver 5.0 Build 2195 Service Pack 2

Path:	C:\cygwin\usr\local\bin
	C:\cygwin\bin
	C:\cygwin\bin
	c:\WINNT\system32
	c:\WINNT
	c:\WINNT\System32\Wbem
	c:\Program Files\Ansys Inc\ANSYS60\bin\intel
	c:\WINNT\system32
	c:\WINNT
	c:\WINNT\System32\Wbem
	c:\Program Files\Ansys Inc\ANSYS60\bin\intel
	c:\tools
	c:\vim\vim61\
	C:\cygwin\bin

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

HOME = `C:\cygwin\home\Manfred Spraul'
MAKE_MODE = `unix'
PWD = `/cygdrive/c/temp'
USER = `Manfred Spraul'

ALLUSERSPROFILE = `C:\Documents and Settings\All Users'
ANSYS60_DIR = `C:\PROGRAM FILES\ANSYS INC\ANSYS60'
ANSYSLIC_DIR = `C:\PROGRAM FILES\ANSYS INC\SHARED FILES\LICENSING'
ANSYS_SYSDIR = `Intel'
APPDATA = `C:\Documents and Settings\Manfred Spraul\Application Data'
COMMONPROGRAMFILES = `C:\Program Files\Common Files'
COMPUTERNAME = `AB'
COMSPEC = `C:\WINNT\system32\cmd.exe'
EVOLVERPATH = `C:\tools\'
HOMEDRIVE = `C:'
HOMEPATH = `\'
LOGONSERVER = `\\AB'
MANPATH = `:/usr/ssl/man'
MPSTKZ = `8m'
NUMBER_OF_PROCESSORS = `1'
OLDPWD = `/cygdrive/f/CC'
OS2LIBPATH = `C:\WINNT\system32\os2\dll;'
OS = `Windows_NT'
PATHEXT = `.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH'
PROCESSOR_ARCHITECTURE = `x86'
PROCESSOR_IDENTIFIER = `x86 Family 6 Model 11 Stepping 1, GenuineIntel'
PROCESSOR_LEVEL = `6'
PROCESSOR_REVISION = `0b01'
PROGRAMFILES = `C:\Program Files'
PROMPT = `$P$G'
PS1 = `\[\033]0;\w\007
\033[32m\]\u@\h \[\033[33m\w\033[0m\]
$ '
SHLVL = `1'
SYSTEMDRIVE = `C:'
SYSTEMROOT = `C:\WINNT'
TEMP = `c:\TEMP'
TERM = `cygwin'
TMP = `c:\TEMP'
USERDOMAIN = `AB'
USERNAME = `Manfred Spraul'
USERPROFILE = `C:\Documents and Settings\Manfred Spraul'
WINDIR = `C:\WINNT'
_ = `/usr/bin/cygcheck'

HKEY_CURRENT_USER\Software\Cygnus Solutions
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\Program Options
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2
  (default) = `/cygdrive'
  cygdrive flags = 0x00000022
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/
  (default) = `C:\cygwin'
  flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/bin
  (default) = `C:\cygwin/bin'
  flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/lib
  (default) = `C:\cygwin/lib'
  flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/X11R6/lib/X11/fonts
  (default) = `C:\cygwin\usr\X11R6\lib\X11\fonts'
  flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\Program Options

a:  fd           N/A    N/A                    
c:  hd  FAT32   3992Mb  76% CP    UN           
e:  cd  CDFS     173Mb 100%    CS UN           NEU
f:  hd  FAT32   8447Mb  24% CP    UN           

C:\cygwin                          /                         system  binmode
C:\cygwin/bin                      /usr/bin                  system  binmode
C:\cygwin/lib                      /usr/lib                  system  binmode
C:\cygwin\usr\X11R6\lib\X11\fonts  /usr/X11R6/lib/X11/fonts  system  binmode
.                                  /cygdrive                 user    binmode,cygdrive

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:\cygwin\bin\gdb.exe
Found: C:\cygwin\bin\ld.exe
Found: C:\cygwin\bin\ls.exe
Found: C:\cygwin\bin\make.exe
Found: C:\cygwin\bin\sh.exe

   19k 2002/02/20 C:\cygwin\bin\cyggdbm.dll - os=4.0 img=1.0 sys=4.0
                  "cyggdbm.dll" v0.0 ts=2002/2/20 4:05
  929k 2002/06/24 C:\cygwin\bin\cygiconv-2.dll - os=4.0 img=1.0 sys=4.0
                  "cygiconv-2.dll" v0.0 ts=2002/6/24 20:24
   21k 2001/06/20 C:\cygwin\bin\cygintl.dll - os=4.0 img=1.0 sys=4.0
                  "cygintl.dll" v0.0 ts=2001/6/20 19:09
   22k 2001/12/13 C:\cygwin\bin\cygintl-1.dll - os=4.0 img=1.0 sys=4.0
                  "cygintl-1.dll" v0.0 ts=2001/12/13 10:28
   23k 2002/06/24 C:\cygwin\bin\cygintl-2.dll - os=4.0 img=1.0 sys=4.0
                  "cygintl-2.dll" v0.0 ts=2002/6/24 6:54
   45k 2001/04/25 C:\cygwin\bin\cygform5.dll - os=4.0 img=1.0 sys=4.0
                  "cygform5.dll" v0.0 ts=2001/4/25 7:28
   26k 2001/04/25 C:\cygwin\bin\cygmenu5.dll - os=4.0 img=1.0 sys=4.0
                  "cygmenu5.dll" v0.0 ts=2001/4/25 7:27
  156k 2001/04/25 C:\cygwin\bin\cygncurses++5.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses++5.dll" v0.0 ts=2001/4/25 7:29
  226k 2001/04/25 C:\cygwin\bin\cygncurses5.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses5.dll" v0.0 ts=2001/4/25 7:17
   15k 2001/04/25 C:\cygwin\bin\cygpanel5.dll - os=4.0 img=1.0 sys=4.0
                  "cygpanel5.dll" v0.0 ts=2001/4/25 7:27
   35k 2002/01/09 C:\cygwin\bin\cygform6.dll - os=4.0 img=1.0 sys=4.0
                  "cygform6.dll" v0.0 ts=2002/1/9 7:03
   20k 2002/01/09 C:\cygwin\bin\cygmenu6.dll - os=4.0 img=1.0 sys=4.0
                  "cygmenu6.dll" v0.0 ts=2002/1/9 7:03
  175k 2002/01/09 C:\cygwin\bin\cygncurses++6.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses++6.dll" v0.0 ts=2002/1/9 7:03
  202k 2002/01/09 C:\cygwin\bin\cygncurses6.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses6.dll" v0.0 ts=2002/1/9 7:03
   12k 2002/01/09 C:\cygwin\bin\cygpanel6.dll - os=4.0 img=1.0 sys=4.0
                  "cygpanel6.dll" v0.0 ts=2002/1/9 7:03
   17k 2001/06/28 C:\cygwin\bin\cyghistory4.dll - os=4.0 img=1.0 sys=4.0
                  "cyghistory4.dll" v0.0 ts=2001/1/7 5:34
  108k 2001/06/28 C:\cygwin\bin\cygreadline4.dll - os=4.0 img=1.0 sys=4.0
                  "cygreadline4.dll" v0.0 ts=2001/1/7 5:34
   40k 2001/11/21 C:\cygwin\bin\cygpcre.dll - os=4.0 img=1.0 sys=4.0
                  "cygpcre.dll" v0.0 ts=2001/11/21 23:15
   39k 2001/11/21 C:\cygwin\bin\cygpcreposix.dll - os=4.0 img=1.0 sys=4.0
                  "cygpcreposix.dll" v0.0 ts=2001/11/21 23:15
   50k 2002/03/12 C:\cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
                  "cygz.dll" v0.0 ts=2002/3/12 5:38
   58k 2002/05/07 C:\cygwin\bin\cygbz2-1.dll - os=4.0 img=1.0 sys=4.0
                  "cygbz2-1.dll" v0.0 ts=2002/5/7 8:33
   81k 2001/10/20 C:\cygwin\bin\cygitcl30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitcl30.dll" v0.0 ts=2001/10/20 2:25
   35k 2001/10/20 C:\cygwin\bin\cygitk30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitk30.dll" v0.0 ts=2001/10/20 2:25
  390k 2001/10/20 C:\cygwin\bin\cygtcl80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtcl80.dll" v0.0 ts=2001/10/20 2:24
    5k 2001/10/20 C:\cygwin\bin\cygtclpip80.dll - os=4.0 img=1.0 sys=4.0
   10k 2001/10/20 C:\cygwin\bin\cygtclreg80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtclreg80.dll" v0.0 ts=2001/10/20 2:24
  623k 2001/10/20 C:\cygwin\bin\cygtk80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtk80.dll" v0.0 ts=2001/10/20 2:25
  621k 2002/05/17 C:\cygwin\bin\cygcrypto.dll - os=4.0 img=1.0 sys=4.0
                  "cygcrypto.dll" v0.0 ts=2002/5/17 14:24
  156k 2002/05/17 C:\cygwin\bin\cygssl.dll - os=4.0 img=1.0 sys=4.0
                  "cygssl.dll" v0.0 ts=2002/5/17 14:24
   20k 2002/07/17 C:\cygwin\bin\cyghistory5.dll - os=4.0 img=1.0 sys=4.0
                  "cyghistory5.dll" v0.0 ts=2002/7/17 23:18
  127k 2002/07/17 C:\cygwin\bin\cygreadline5.dll - os=4.0 img=1.0 sys=4.0
                  "cygreadline5.dll" v0.0 ts=2002/7/17 23:18
  883k 2002/07/06 C:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
                  "cygwin1.dll" v0.0 ts=2002/7/6 8:16
    Cygwin DLL version info:
        DLL version: 1.3.12
        DLL epoch: 19
        DLL bad signal mask: 19005
        DLL old termios: 5
        DLL malloc env: 28
        API major: 0
        API minor: 54
        Shared data: 3
        DLL identifier: cygwin1
        Mount registry: 2
        Cygnus registry name: Cygnus Solutions
        Cygwin registry name: Cygwin
        Program options name: Program Options
        Cygwin mount registry name: mounts v2
        Cygdrive flags: cygdrive flags
        Cygdrive prefix: cygdrive prefix
        Cygdrive default prefix: 
        Build date: Sat Jul 6 02:16:58 EDT 2002
        CVS tag: cygwin-1-3-12-1
        Shared id: cygwin1S3


Cygwin Package Information
Last downloaded files to: c:\cygpkgs
Last downloaded files from: ftp://ftp.inf.tu-dresden.de/software/windows/cygwin32

Package             Version             
XFree86-base        4.2.0-1             
XFree86-bin         4.2.0-1             
XFree86-etc         4.2.0-1             
XFree86-fenc        4.2.0-2             
XFree86-fnts        4.2.0-2             
XFree86-lib         4.2.0-3             
XFree86-startup-scripts4.2.0-2             
XFree86-xserv       4.2.0-10            
_update-info-dir    00037-1             
ash                 20020131-1          
bash                2.05b-1             
binutils            20020706-2          
bzip2               1.0.2-2             
crypt               1.0-1               
cvs                 1.11.0-1            
cygwin              1.3.12-2            
diff                1.0-1               
diffutils           2.8.1-1             
fileutils           4.1-1               
findutils           4.1.7-4             
gawk                3.0.4-1             
gcc                 3.1.1-4             
gdb                 20010428-3          
gdbm                1.8.0-4             
gettext             0.11.2-2            
grep                2.5-1               
groff               1.17.2-1            
gzip                1.3.3-3             
less                374-1               
libbz2_1            1.0.2-2             
libiconv2           1.8-2               
libintl             0.10.38-3           
libintl1            0.10.40-1           
libintl2            0.11.2-2            
libncurses5         5.2-1               
libncurses6         5.2-8               
libreadline4        4.1-2               
libreadline5        4.3-1               
login               1.4-3               
make                3.79.1-7            
man                 1.5g-2              
mingw-runtime       2.0-2               
ncurses             5.2-8               
openssh             3.4p1-4             
openssl             0.9.6d-1            
pcre                3.7-1               
readline            4.3-1               
sed                 3.02-1              
sh-utils            2.0-2               
tar                 1.13.19-1           
termcap             20020403-1          
terminfo            5.2-3               
texinfo             4.2-3               
textutils           2.0.21-1            
vim                 6.1-2               
w32api              1.5-1               
which               1.5-1               
zlib                1.1.4-1             

Use -h to see help about each section

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