From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: Regression (last snapshot)
Date: Mon, 29 Jul 2019 15:23:00 -0000 [thread overview]
Message-ID: <20190729152327.GQ11632@calimero.vinschen.de> (raw)
In-Reply-To: <ced2750a-0a52-1396-b6c1-f4228116bde7@cornell.edu>
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On Jul 29 14:26, Ken Brown wrote:
> On 7/29/2019 9:47 AM, Corinna Vinschen wrote:
> > On Jul 29 13:18, Ken Brown wrote:
> >> $ strace -o trace.out ls -lL <(grep bash .bashrc)
> >> ls: cannot access '/dev/fd/63': No such file or directory
> >
> > No, please run bash:
> >
> > strace -o trace.out bash -c 'ls -lL <(grep bash .bashrc)'
> >
> > Otherwise there's no process actually creating the pipe, given the <()
> > expression is a bash expression.
>
> Yes, of course. I should have realized this since it's exactly what I
> did under gdb. Anyway, the result is the same as it was under gdb: If
> I run the command under strace, I don't see the broken pipe error.
>
> Is it possible that debugging causes an fd to the read end of the pipe
> to stay open longer, thereby preventing the error?
The fact that you observe it sporadically points to a race condition.
Debugging serializes stuff usually running in parallel, potentially
eliminating the race.
Corinna
--
Corinna Vinschen
Cygwin Maintainer
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next prev parent reply other threads:[~2019-07-29 15:23 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-20 22:55 Houder
2019-07-21 9:38 ` Houder
2019-07-21 9:42 ` Houder
2019-07-22 12:23 ` Ken Brown
2019-07-22 13:44 ` Ken Brown
2019-07-22 15:20 ` Corinna Vinschen
2019-07-22 15:53 ` Corinna Vinschen
2019-07-22 16:45 ` Corinna Vinschen
2019-07-22 18:47 ` Houder
2019-07-26 22:12 ` Ken Brown
2019-07-27 0:14 ` Ken Brown
2019-07-27 10:21 ` Houder
2019-07-27 15:24 ` Ken Brown
2019-07-27 16:25 ` Houder
2019-07-29 8:45 ` Corinna Vinschen
2019-07-29 13:18 ` Ken Brown
2019-07-29 13:35 ` Ken Brown
2019-07-29 13:48 ` Corinna Vinschen
2019-07-29 13:47 ` Corinna Vinschen
2019-07-29 14:26 ` Ken Brown
2019-07-29 15:23 ` Corinna Vinschen [this message]
2019-07-29 15:40 ` Corinna Vinschen
2019-07-29 18:56 ` Ken Brown
2019-07-31 15:53 ` Ken Brown
2019-07-31 18:00 ` Ken Brown
2019-08-01 9:01 ` Corinna Vinschen
2019-08-01 14:27 ` Jon Turney
2019-08-01 15:30 ` Ken Brown
2019-08-01 15:38 ` Eric Blake
2019-08-01 16:04 ` Corinna Vinschen
2019-08-01 21:17 ` Ken Brown
2019-08-02 2:32 ` Ken Brown
2019-08-02 14:34 ` Ken Brown
2019-08-02 15:04 ` Corinna Vinschen
2019-08-02 21:26 ` Brian Inglis
2019-08-02 21:53 ` Ken Brown
2019-08-02 21:58 ` Eric Blake
2019-08-03 3:50 ` Brian Inglis
2019-08-03 13:14 ` Ken Brown
2019-08-04 16:52 ` Houder
2019-08-01 10:03 ` Houder
2019-08-01 10:46 ` Houder
2019-08-01 12:20 ` Ken Brown
2019-08-01 14:29 ` Houder
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