On Fri, 19 May 2006, Christopher Faylor wrote:
> On Fri, May 19, 2006 at 10:01:27PM -0400, Igor Peshansky wrote:
> >Hi,
> >
> >Found a weird problem with the latest CVS (a regression from end February,
> >but I can track it down further, too, if the testcase doesn't help).
> >Compiling the following program:
> >
> >#include <stdio.h>
> >int main() { printf("1\n"); exit(-1); }
> >
> >with "gcc -mno-cygwin" and running it produces the following output:
> >
> >1
> >979250836 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979250894 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979250920 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979264978 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979265034 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979267613 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979278806 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979278860 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979278886 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979289509 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979289568 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979289595 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >979300049 [proc_waiter] bash 5028 proc_waiter: unknown value 49 on proc pipe
> >979300106 [proc_waiter] bash 5028 proc_waiter: unknown value 13 on proc pipe
> >979300411 [proc_waiter] bash 5028 proc_waiter: unknown value 10 on proc pipe
> >
> >but (!) only in an xterm. Try as I might, I couldn't reproduce this in
> >rxvt or bash with CYGWIN=tty. I don't know what the differences are, but
> >there it is. I did reproduce this in an xterm running tcsh and pdksh (and
> >a perl shell, interestingly enough). The above testcase was distilled
> >from a huge Java program that exhibited this behavior.
> >
> >Note that 49 is really the character '1', and 13 and 10 are CRLF. I've
> >also gotten other characters at times, all corresponding to valid messages
> >from the program, printed to either stdout or stderr. The number of times
> >it repeats also seems to vary -- in some cases it's only once, in others
> >more (it's repeated 5 times above).
>
> I can't duplicate this but, I'm not really interested in this kind of
> problem unless you can duplicate the problem with a cygwin snapshot.
> Otherwise, there is no way of knowing how you've built the DLL or what
> other local mods might be in it.
Sorry, should've mentioned that I can also duplicate this with both the
20060518 and 20060516 snapshots. Here's 20060518:
$ uname -svr
CYGWIN_NT-5.1 1.5.20s(0.155/4/2) 20060518 22:17:41
$ cygstart xterm -display localhost:0.0
In the xterm:
$ ./testprog
1
3 [proc_waiter] bash 4908 proc_waiter: unknown value 49 on proc pipe
74 [proc_waiter] bash 4908 proc_waiter: unknown value 13 on proc pipe
105 [proc_waiter] bash 4908 proc_waiter: unknown value 10 on proc pipe
13140 [proc_waiter] bash 4908 proc_waiter: unknown value 49 on proc pipe
[snip]
Igor
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