GNU bug report logs - #19860
25.0.50; One url-retrieve-synchronously call running concurrently with another can freeze it

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From: Dmitry Gutov <dgutov <at> yandex.ru>
To: 19860 <at> debbugs.gnu.org
Subject: bug#19860: Acknowledgement (25.0.50; One url-retrieve-synchronously call running concurrently with another can freeze it)
Date: Mon, 16 Feb 2015 03:00:24 +0200

And here's me attaching to that process:

0x00007fae43df32d9 in __pselect (nfds=nfds <at> entry=14, 
readfds=readfds <at> entry=0x7fffa07d4370, writefds=0x7fffa07d43f0, 
exceptfds=exceptfds <at> entry=0x0, timeout=<optimized out>, 
timeout <at> entry=0x7fffa07d4920,
    sigmask=sigmask <at> entry=0x0) at ../sysdeps/unix/sysv/linux/pselect.c:77
77	../sysdeps/unix/sysv/linux/pselect.c: No such file or directory.
(gdb) finish
Run till exit from #0  0x00007fae43df32d9 in __pselect 
(nfds=nfds <at> entry=14, readfds=readfds <at> entry=0x7fffa07d4370, 
writefds=0x7fffa07d43f0, exceptfds=exceptfds <at> entry=0x0, 
timeout=<optimized out>,
    timeout <at> entry=0x7fffa07d4920, sigmask=sigmask <at> entry=0x0) at 
../sysdeps/unix/sysv/linux/pselect.c:77
0x00000000005b464a in xg_select (fds_lim=14, 
rfds=rfds <at> entry=0x7fffa07d4940, wfds=0x7fffa07d49c0, 
efds=efds <at> entry=0x0, timeout=timeout <at> entry=0x7fffa07d4920, 
sigmask=sigmask <at> entry=0x0) at xgselect.c:114
114	  nfds = pselect (fds_lim, &all_rfds, have_wfds ? &all_wfds : NULL,
Value returned is $1 = 1
(gdb) finish
Run till exit from #0  0x00000000005b464a in xg_select (fds_lim=14, 
rfds=rfds <at> entry=0x7fffa07d4940, wfds=0x7fffa07d49c0, 
efds=efds <at> entry=0x0, timeout=timeout <at> entry=0x7fffa07d4920,
    sigmask=sigmask <at> entry=0x0) at xgselect.c:114
0x00000000005836e1 in wait_reading_process_output (time_limit=<optimized 
out>, nsecs=0, read_kbd=read_kbd <at> entry=0, 
do_display=do_display <at> entry=false, wait_for_cell=wait_for_cell <at> entry=0,
    wait_proc=0x351a938, just_wait_proc=0) at process.c:4597
4597		  nfds = xg_select
Value returned is $2 = -1
(gdb) finish
Run till exit from #0  0x00000000005836e1 in wait_reading_process_output 
(time_limit=<optimized out>, nsecs=0, read_kbd=read_kbd <at> entry=0, 
do_display=do_display <at> entry=false,
    wait_for_cell=wait_for_cell <at> entry=0, wait_proc=0x351a938, 
just_wait_proc=0) at process.c:4597

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