GNU bug report logs - #15413
24.3.50; Emacs gets hung by find-file for //<TAB>

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Katsumi Yamaoka <yamaoka <at> jpl.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; Emacs gets hung by find-file for //<TAB>
Date: Thu, 19 Sep 2013 08:51:41 +0900

When performing find-file, Emacs gets hung if I mistyped as:

Find file: // and <TAB>

As it might be because C-g doesn't break an inf-loop on Cygwin
Emacs (bug#14553), there seems to be no way to get out of it
except for killing the Emacs process.  For a wonder, Emacs does
not eat CPU so much at that time.

In GNU Emacs 24.3.50.1 (i686-pc-cygwin, GTK+ Version 3.8.2)
 of 2013-09-19 on localhost
Bzr revision: 114379 acm <at> muc.de-20130918204737-2ed6jt7qnku9okim
Windowing system distributor `The Cygwin/X Project', version 11.0.11403000
Configured using:
 `configure --verbose --with-x-toolkit=gtk3
 --without-dbus --without-gconf --without-gsettings'

Message #8 received at 15413 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Katsumi Yamaoka <yamaoka <at> jpl.org>
Cc: 15413 <at> debbugs.gnu.org
Subject: Re: bug#15413: 24.3.50; Emacs gets hung by find-file for //<TAB>
Date: Thu, 19 Sep 2013 10:03:46 +0300

> Date: Thu, 19 Sep 2013 08:51:41 +0900
> From: Katsumi Yamaoka <yamaoka <at> jpl.org>
> 
> When performing find-file, Emacs gets hung if I mistyped as:
> 
> Find file: // and <TAB>
> 
> As it might be because C-g doesn't break an inf-loop on Cygwin
> Emacs (bug#14553), there seems to be no way to get out of it
> except for killing the Emacs process.  For a wonder, Emacs does
> not eat CPU so much at that time.

My guess is it doesn't hang, it tries to access the network, since //
is the beginning of a UNC file name.  Try waiting longer.

Message #13 received at 15413-done <at> debbugs.gnu.org (full text, mbox):

From: Katsumi Yamaoka <yamaoka <at> jpl.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 15413-done <at> debbugs.gnu.org
Subject: Re: bug#15413: 24.3.50; Emacs gets hung by find-file for //<TAB>
Date: Fri, 20 Sep 2013 15:17:23 +0900

Eli Zaretskii wrote:
>> Date: Thu, 19 Sep 2013 08:51:41 +0900
>> From: Katsumi Yamaoka <yamaoka <at> jpl.org>
>>
>> When performing find-file, Emacs gets hung if I mistyped as:
>>
>> Find file: // and <TAB>
>>
>> As it might be because C-g doesn't break an inf-loop on Cygwin
>> Emacs (bug#14553), there seems to be no way to get out of it
>> except for killing the Emacs process.  For a wonder, Emacs does
>> not eat CPU so much at that time.

> My guess is it doesn't hang, it tries to access the network, since //
> is the beginning of a UNC file name.  Try waiting longer.

I left it for hours but it didn't seem to return.  Oh, I see.
It must be trying to complete a UNC file name.  In xterm that
runs tcsh, `cd //<C-d>' doesn't return, too.  Therefore, this
should not be an Emacs bug.  I'm closing this thread.  Thanks.

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