bug#21738: 25.0.50; eww freezes/crashes at times

[Kaushal Modi <kaushal.modi@gmail.com>]

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Here's another bt log (attached). I will not be exiting this gdb
session now. Please let me know what more info I can provide.

[-- Attachment #2: emacs_25_Imagemagick_eww_freeze_gdb_bt2.log --]
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(gdb) r -Q
Starting program: /home/kmodi/downloads/git/emacs_gdb/src/emacs -Q
Missing separate debuginfo for /home/kmodi/usr_local/6/lib64/libgif.so.4
Try: yum --enablerepo='*-debug*' install /usr/lib/debug/.build-id/4d/d406f2679fcf6adf281479e95a0ae8f66c7c4e.debug
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffedb6f700 (LWP 11241)]

(emacs:11233): GLib-GIO-CRITICAL **: g_settings_schema_source_lookup: assertion 'source != NULL' failed
[New Thread 0x7fffe6574700 (LWP 11272)]
emacs: Memory allocation failed `No such file or directory' @ fatal/tiff.c/UnregisterTIFFImage/2379.
^Z
Program received signal SIGTSTP, Stopped (user).
0x0000003a9840eb9e in ?? () from /usr/lib64/libgomp.so.1
Missing separate debuginfos, use: debuginfo-install GConf2-2.28.0-6.el6.x86_64 ORBit2-2.14.17-5.el6.x86_64 alsa-lib-1.0.22-3.el6.x86_64 atk-1.30.0-1.el6.x86_64 bzip2-libs-1.0.5-7.el6_0.x86_64 dbus-libs-1.2.24-7.el6_3.x86_64 expat-2.0.1-11.el6_2.x86_64 fftw-3.2.1-3.1.el6.x86_64 gdk-pixbuf2-2.24.1-5.el6.x86_64 glibc-2.12-1.149.el6_6.5.x86_64 gmp-4.3.1-7.el6_2.2.x86_64 gtk2-2.24.23-6.el6.x86_64 gtk2-engines-2.18.4-5.el6.x86_64 libICE-1.0.6-1.el6.x86_64 libSM-1.2.1-2.el6.x86_64 libX11-1.6.0-2.2.el6.x86_64 libXau-1.0.6-4.el6.x86_64 libXcomposite-0.4.3-4.el6.x86_64 libXcursor-1.1.14-2.1.el6.x86_64 libXdamage-1.1.3-4.el6.x86_64 libXext-1.3.2-2.1.el6.x86_64 libXfixes-5.0.1-2.1.el6.x86_64 libXft-2.3.1-2.el6.x86_64 libXi-1.7.2-2.2.el6.x86_64 libXinerama-1.1.3-2.1.el6.x86_64 libXpm-3.5.10-2.el6.x86_64 libXrandr-1.4.1-2.1.el6.x86_64 libXrender-0.9.8-2.1.el6.x86_64 libXt-1.1.4-6.1.el6.x86_64 libacl-2.2.49-6.el6.x86_64 libattr-2.4.44-7.el6.x86_64 libcroco-0.6.2-5.el6.x86_64 libgcc-4.4.7-11.el6.x86_64 libgomp-4.4.7-11.el6.x86_64 libgsf-1.14.15-5.el6.x86_64 libjpeg-turbo-1.2.1-3.el6_5.x86_64 librsvg2-2.26.0-14.el6.x86_64 libselinux-2.0.94-5.8.el6.x86_64 libtiff-3.9.4-10.el6_5.x86_64 libuuid-2.17.2-12.18.el6.x86_64 libxcb-1.9.1-2.el6.x86_64 libxml2-2.7.6-14.el6_5.2.x86_64 ncurses-libs-5.7-3.20090208.el6.x86_64 pango-1.28.1-10.el6.x86_64 sssd-client-1.11.6-30.el6.x86_64 xz-libs-4.999.9-0.5.beta.20091007git.el6.x86_64 zlib-1.2.3-29.el6.x86_64
(gdb) bt
#0  0x0000003a9840eb9e in ?? () from /usr/lib64/libgomp.so.1
#1  0x00007ffff607b388 in LockMagickMutex () at ./magick/semaphore-private.h:63
#2  MagickCoreTerminus () at magick/magick.c:1368
#3  0x00007ffff603c559 in DefaultFatalErrorHandler (severity=FatalErrorException, reason=<value optimized out>, description=0x0) at magick/exception.c:335
#4  0x00007ffff603cb00 in CatchException (exception=0x1a70310) at magick/exception.c:211
#5  0x00007ffff62223da in UnregisterTIFFImage () at coders/tiff.c:2379
#6  0x00007ffff60ea975 in UnregisterStaticModules () at magick/static.c:485
#7  0x00007ffff607b3ca in MagickCoreTerminus () at magick/magick.c:1389
#8  0x0000000000692ad5 in imagemagick_load_image (f=0x12aa870, img=0x1a01b10, contents=0x1aeace8 "\211PNG\r\n\032\n", size=46447, filename=0x0) at image.c:8797
#9  0x0000000000692ca8 in imagemagick_load (f=0x12aa870, img=0x1a01b10) at image.c:8850
#10 0x0000000000688492 in lookup_image (f=0x12aa870, spec=27717491) at image.c:1751
#11 0x0000000000686ce3 in Fimage_metadata (spec=27717491, frame=0) at image.c:929
#12 0x00000000005f8487 in Ffuncall (nargs=2, args=0x7fffffff35f8) at eval.c:2653
#13 0x000000000063c36f in exec_byte_code (bytestr=11206412, vector=11206445, maxdepth=14, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#14 0x00000000005f8f8b in funcall_lambda (fun=11206349, nargs=1, arg_vector=0xaaff2d) at eval.c:2876
#15 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff3b18) at eval.c:2699
#16 0x000000000063c36f in exec_byte_code (bytestr=25249764, vector=19873925, maxdepth=38, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#17 0x00000000005f8f8b in funcall_lambda (fun=19870133, nargs=2, arg_vector=0x12f4085) at eval.c:2876
#18 0x00000000005f86fe in Ffuncall (nargs=3, args=0x7fffffff4068) at eval.c:2699
#19 0x000000000063c36f in exec_byte_code (bytestr=16492036, vector=19890373, maxdepth=38, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#20 0x00000000005f8f8b in funcall_lambda (fun=19660405, nargs=1, arg_vector=0x12f80c5) at eval.c:2876
#21 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff45b8) at eval.c:2699
#22 0x000000000063c36f in exec_byte_code (bytestr=25090356, vector=19331141, maxdepth=30, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#23 0x00000000005f8f8b in funcall_lambda (fun=19281981, nargs=1, arg_vector=0x126f845) at eval.c:2876
#24 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff4af8) at eval.c:2699
#25 0x000000000063c36f in exec_byte_code (bytestr=24836836, vector=19870229, maxdepth=14, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#26 0x00000000005f8f8b in funcall_lambda (fun=23939301, nargs=1, arg_vector=0x12f3215) at eval.c:2876
#27 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff5018) at eval.c:2699
#28 0x000000000063c36f in exec_byte_code (bytestr=25090356, vector=19331141, maxdepth=30, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#29 0x00000000005f8f8b in funcall_lambda (fun=19281981, nargs=1, arg_vector=0x126f845) at eval.c:2876
#30 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff5558) at eval.c:2699
#31 0x000000000063c36f in exec_byte_code (bytestr=24836836, vector=19870229, maxdepth=14, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#32 0x00000000005f8f8b in funcall_lambda (fun=23939301, nargs=1, arg_vector=0x12f3215) at eval.c:2876
#33 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff5a78) at eval.c:2699
#34 0x000000000063c36f in exec_byte_code (bytestr=25090356, vector=19331141, maxdepth=30, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#35 0x00000000005f8f8b in funcall_lambda (fun=19281981, nargs=1, arg_vector=0x126f845) at eval.c:2876
#36 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff5fb8) at eval.c:2699
#37 0x000000000063c36f in exec_byte_code (bytestr=25267540, vector=19886461, maxdepth=26, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#38 0x00000000005f8f8b in funcall_lambda (fun=20030525, nargs=1, arg_vector=0x12f717d) at eval.c:2876
#39 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff64f8) at eval.c:2699
#40 0x000000000063c36f in exec_byte_code (bytestr=25090356, vector=19331141, maxdepth=30, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#41 0x00000000005f8f8b in funcall_lambda (fun=19281981, nargs=1, arg_vector=0x126f845) at eval.c:2876
#42 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff6a38) at eval.c:2699
#43 0x000000000063c36f in exec_byte_code (bytestr=25090356, vector=19331141, maxdepth=30, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#44 0x00000000005f8f8b in funcall_lambda (fun=19281981, nargs=1, arg_vector=0x126f845) at eval.c:2876
#45 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff6f78) at eval.c:2699
#46 0x000000000063c36f in exec_byte_code (bytestr=23580228, vector=19376725, maxdepth=14, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#47 0x00000000005f8f8b in funcall_lambda (fun=21899893, nargs=1, arg_vector=0x127aa55) at eval.c:2876
#48 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff7498) at eval.c:2699
#49 0x000000000063c36f in exec_byte_code (bytestr=25090356, vector=19331141, maxdepth=30, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#50 0x00000000005f8f8b in funcall_lambda (fun=19281981, nargs=1, arg_vector=0x126f845) at eval.c:2876
#51 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff79d8) at eval.c:2699
---Type <return> to continue, or q <return> to quit---
#52 0x000000000063c36f in exec_byte_code (bytestr=25073524, vector=21099085, maxdepth=62, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#53 0x00000000005f8f8b in funcall_lambda (fun=19833077, nargs=1, arg_vector=0x141f24d) at eval.c:2876
#54 0x00000000005f86fe in Ffuncall (nargs=2, args=0x7fffffff7f98) at eval.c:2699
#55 0x000000000063c36f in exec_byte_code (bytestr=23377156, vector=26783805, maxdepth=62, args_template=6154, nargs=6, args=0x7fffffff8558) at bytecode.c:880
#56 0x00000000005f8c5a in funcall_lambda (fun=26784109, nargs=6, arg_vector=0x7fffffff8528) at eval.c:2810
#57 0x00000000005f86fe in Ffuncall (nargs=7, args=0x7fffffff8520) at eval.c:2699
#58 0x000000000063c36f in exec_byte_code (bytestr=23953108, vector=26783213, maxdepth=66, args_template=5130, nargs=4, args=0x7fffffff8a88) at bytecode.c:880
#59 0x00000000005f8c5a in funcall_lambda (fun=26783533, nargs=4, arg_vector=0x7fffffff8a68) at eval.c:2810
#60 0x00000000005f86fe in Ffuncall (nargs=5, args=0x7fffffff8a60) at eval.c:2699
#61 0x00000000005f78eb in Fapply (nargs=2, args=0x7fffffff8bf0) at eval.c:2278
#62 0x00000000005f835c in Ffuncall (nargs=3, args=0x7fffffff8be8) at eval.c:2630
#63 0x000000000063c36f in exec_byte_code (bytestr=27303796, vector=27312221, maxdepth=34, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#64 0x00000000005f8f8b in funcall_lambda (fun=27312469, nargs=0, arg_vector=0x1a0c05d) at eval.c:2876
#65 0x00000000005f86fe in Ffuncall (nargs=1, args=0x7fffffff9138) at eval.c:2699
#66 0x000000000063c36f in exec_byte_code (bytestr=27319892, vector=27313253, maxdepth=58, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#67 0x00000000005f8f8b in funcall_lambda (fun=27313725, nargs=3, arg_vector=0x1a0c465) at eval.c:2876
#68 0x00000000005f86fe in Ffuncall (nargs=4, args=0x7fffffff96b8) at eval.c:2699
#69 0x000000000063c36f in exec_byte_code (bytestr=27337716, vector=27315333, maxdepth=18, args_template=0, nargs=0, args=0x0) at bytecode.c:880
#70 0x00000000005f8f8b in funcall_lambda (fun=27315477, nargs=2, arg_vector=0x1a0cc85) at eval.c:2876
#71 0x00000000005f86fe in Ffuncall (nargs=3, args=0x7fffffff9be0) at eval.c:2699
#72 0x00000000005f78eb in Fapply (nargs=2, args=0x7fffffff9ca0) at eval.c:2278
#73 0x00000000005f7e3b in apply1 (fn=14221712, arg=26872579) at eval.c:2494
#74 0x000000000064b80b in read_process_output_call (fun_and_args=26872499) at process.c:5237
#75 0x00000000005f52f3 in internal_condition_case_1 (bfun=0x64b7dd <read_process_output_call>, arg=26872499, handlers=18912, hfun=0x64b80d <read_process_output_error_handler>) at eval.c:1333
#76 0x000000000064bfa0 in read_and_dispose_of_process_output (p=0x1a38740,
    chars=0x7fffffff9dc0 "\277\315\367\214k\362\375NC\376\222\371\022A\b\244\210\063\374|\366\222\254\004\362\223\315\311\307\317\321\313\304\b.ۮ\224\034\003\016\374\f4=@\264ص\016\307o.\177\276W\351N\277\375\364vm\b\276\023j_W\037\270\035&\273\276>\003;Lv\231\212\025;\f\267\232\b\270\016\027\326s\217\035\254Z\273ܩ\025!\270\271\222v\246\033rO\351F\330\313\324\005pP\370\217\377#6\364\350\270\371\373\375\201D\020\367\244}\372\200\214\245\217A\200\217IF|\311\335l\303\066\267\274\060\366z\205㣩7\034?\316{\234\352\b#\177\236c\311\006\370\033\225*#\257\235\024\252\204K\002\330]\352\210\314\322\336\340\276o\315\333qS"...,
    nbytes=1187, coding=0x1a3e270) at process.c:5445
#77 0x000000000064bbf5 in read_process_output (proc=27494213, channel=21) at process.c:5356
#78 0x000000000064b177 in wait_reading_process_output (time_limit=30, nsecs=0, read_kbd=-1, do_display=true, wait_for_cell=0, wait_proc=0x0, just_wait_proc=0) at process.c:5063
#79 0x00000000004240ef in sit_for (timeout=122, reading=true, display_option=1) at dispnew.c:5751
#80 0x000000000055d7e0 in read_char (commandflag=1, map=26873939, prev_event=0, used_mouse_menu=0x7fffffffb64f, end_time=0x0) at keyboard.c:2700
#81 0x000000000056a83b in read_key_sequence (keybuf=0x7fffffffb810, bufsize=30, prompt=0, dont_downcase_last=false, can_return_switch_frame=true, fix_current_buffer=true, prevent_redisplay=false)
    at keyboard.c:9028
#82 0x000000000055a511 in command_loop_1 () at keyboard.c:1346
#83 0x00000000005f518e in internal_condition_case (bfun=0x55a103 <command_loop_1>, handlers=18912, hfun=0x559900 <cmd_error>) at eval.c:1309
#84 0x0000000000559e0b in command_loop_2 (ignore=0) at keyboard.c:1086
#85 0x00000000005f4987 in internal_catch (tag=45552, func=0x559de2 <command_loop_2>, arg=0) at eval.c:1073
#86 0x0000000000559db4 in command_loop () at keyboard.c:1065
#87 0x00000000005594d5 in recursive_edit_1 () at keyboard.c:671
#88 0x0000000000559662 in Frecursive_edit () at keyboard.c:742
#89 0x0000000000557675 in main (argc=2, argv=0x7fffffffbcc8) at emacs.c:1644
(gdb)