Following instructions at https://wiki.ubuntu.com/Chromium/Debugging.
(The UI displays timeout error when uploading the file)

# Env:
#     LD_LIBRARY_PATH=
#                
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
#            GTK_PATH=
# CHROMIUM_USER_FLAGS=
#      CHROMIUM_FLAGS=  --enable-pinch
/usr/bin/gdb /usr/lib/chromium-browser/chromium-browser -x 
/tmp/chromiumargs.x2aQQO
GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/lib/chromium-browser/chromium-browser...Reading 
symbols from 
/usr/lib/debug/.build-id/1b/e9a48bbeed75ce14d5b4ab231a72aef655f4bb.debug...done.
done.
(gdb) handle SIG33 pass nostop noprint
Signal        Stop      Print   Pass to program Description
SIG33         No        No      Yes             Real-time event 33
(gdb) set pagination 0
(gdb) run
Starting program: /usr/lib/chromium-browser/chromium-browser --enable-pinch 
warning: the debug information found in 
"/usr/lib/debug//lib/i386-linux-gnu/ld-2.27.so" does not match 
"/lib/ld-linux.so.2" (CRC mismatch).

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xb4358b40 (LWP 16234)]
[New Thread 0xb39ffb40 (LWP 16240)]
[New Thread 0xb1f39b40 (LWP 16241)]
[New Thread 0xb1738b40 (LWP 16242)]
[New Thread 0xb0bffb40 (LWP 16243)]
[New Thread 0xb03feb40 (LWP 16244)]
[New Thread 0xaf9ffb40 (LWP 16245)]
[New Thread 0xaf1feb40 (LWP 16246)]
[New Thread 0xae7c3b40 (LWP 16247)]
[New Thread 0xadfc2b40 (LWP 16248)]

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.990: Theme parsing
error: gtk.css:597:14: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.990: Theme parsing
error: gtk.css:597:14: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.990: Theme parsing
error: gtk.css:600:17: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.991: Theme parsing
error: gtk.css:784:14: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.991: Theme parsing
error: gtk.css:784:14: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.991: Theme parsing
error: gtk.css:787:17: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.993: Theme parsing
error: gtk.css:1096:14: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.993: Theme parsing
error: gtk.css:1096:14: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.993: Theme parsing
error: gtk.css:1099:17: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.999: Theme parsing
error: gtk.css:2286:8: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.999: Theme parsing
error: gtk.css:2286:18: Using Pango syntax for the font: style property
is deprecated; please use CSS syntax

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.999: Theme parsing
error: gtk.css:2291:8: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:49.999: Theme parsing
error: gtk.css:2291:18: Using Pango syntax for the font: style property
is deprecated; please use CSS syntax

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.005: Theme parsing
error: gtk.css:4357:14: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.005: Theme parsing
error: gtk.css:4357:14: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.005: Theme parsing
error: gtk.css:4419:12: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.005: Theme parsing
error: gtk.css:4419:12: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.005: Theme parsing
error: gtk.css:4428:16: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing
error: gtk.css:4428:16: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing
error: gtk.css:4443:22: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing
error: gtk.css:4443:22: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing
error: gtk.css:4499:12: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing
error: gtk.css:4501:16: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing
error: gtk.css:4501:16: Expected a string.

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing
error: gtk.css:4549:12: not a number

(chromium-browser:16230): Gtk-WARNING **: 01:33:50.006: Theme parsing error: 
gtk.css:4549:12: Expected a string.
[New Thread 0xad75fb40 (LWP 16249)]
[New Thread 0xae90cb40 (LWP 16250)]
[New Thread 0xacf5eb40 (LWP 16251)]
[New Thread 0xac75db40 (LWP 16252)]
[New Thread 0xabf5cb40 (LWP 16253)]
[New Thread 0xab6dbb40 (LWP 16254)]
[New Thread 0xaaeb9b40 (LWP 16255)]
warning: Error reading shared library list entry at 0x2ad0
[New Thread 0xa96b6b40 (LWP 16258)]
[New Thread 0xaa6b8b40 (LWP 16256)]
[New Thread 0xa9eb7b40 (LWP 16257)]
[New Thread 0xa8e34b40 (LWP 16260)]
[New Thread 0xa84b6b40 (LWP 16263)]
MESA-LOADER: failed to retrieve device information
MESA-LOADER: failed to open i915 (search paths 
/usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load driver: i915
MESA-LOADER: failed to open kms_swrast (search paths 
/usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load driver: kms_swrast
MESA-LOADER: failed to open swrast (search paths 
/usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load swrast driver
warning: Error reading shared library list entry at 0x3e60
[New Thread 0xa58bdb40 (LWP 16278)]
[New Thread 0xa4a5eb40 (LWP 16301)]
[New Thread 0xa3d3fb40 (LWP 16307)]
[New Thread 0xa21ffb40 (LWP 16314)]
[New Thread 0xa19feb40 (LWP 16336)]
[Thread 0xa3d3fb40 (LWP 16307) exited]
[Thread 0xa21ffb40 (LWP 16314) exited]
** Message: 01:34:33.361: Remote error from secret service: 
org.freedesktop.DBus.Error.UnknownMethod: No such interface 
'org.freedesktop.Secret.Collection' on object at path 
/org/freedesktop/secrets/collection/login
** Message: 01:34:33.979: Remote error from secret service: 
org.freedesktop.DBus.Error.UnknownMethod: No such interface 
'org.freedesktop.Secret.Collection' on object at path 
/org/freedesktop/secrets/collection/login
[Thread 0xac75db40 (LWP 16252) exited]
[Thread 0xa84b6b40 (LWP 16263) exited]
[Thread 0xb1738b40 (LWP 16242) exited]
[Thread 0xacf5eb40 (LWP 16251) exited]
[New Thread 0xacf5eb40 (LWP 16430)]
[Thread 0xacf5eb40 (LWP 16430) exited]
[New Thread 0xacf5eb40 (LWP 16461)]
[Thread 0xacf5eb40 (LWP 16461) exited]
[New Thread 0xb1738b40 (LWP 16465)]
[New Thread 0xacf5eb40 (LWP 16464)]
[Thread 0xb1738b40 (LWP 16465) exited]
[Thread 0xacf5eb40 (LWP 16464) exited]
[New Thread 0xacf5eb40 (LWP 16485)]
[New Thread 0xb1738b40 (LWP 16500)]
[New Thread 0xa84b6b40 (LWP 16501)]
[New Thread 0xac75db40 (LWP 16507)]
[Thread 0xb1738b40 (LWP 16500) exited]
[Thread 0xac75db40 (LWP 16507) exited]
[Thread 0xb0bffb40 (LWP 16243) exited]

Thread 1 "chromium-browse" received signal SIGINT, Interrupt.
0xb7fd6d09 in __kernel_vsyscall ()
(gdb) backtrace
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb617e43b in __GI___poll (fds=0xa219950, nfds=5, timeout=8117) at 
../sysdeps/unix/sysv/linux/poll.c:29
#2  0xb75eb7d0 in g_poll () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb75dc26a in ?? () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb75dc3b4 in g_main_context_iteration () from 
/usr/lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x03bd9408 in Run () at ../../base/message_loop/message_pump_glib.cc:439
#6  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#7  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#8  0x03bfce17 in Run () at ../../base/run_loop.cc:124
#9  0x03abd23f in MainMessageLoopRun () at 
../../chrome/browser/chrome_browser_main.cc:1684
#10 0x01c57ed2 in RunMainMessageLoopParts () at 
../../content/browser/browser_main_loop.cc:1055
#11 0x01c5a542 in Run () at 
../../content/browser/browser_main_runner_impl.cc:150
#12 0x01c54b90 in BrowserMain () at ../../content/browser/browser_main.cc:47
#13 0x036c3ea4 in RunBrowserProcessMain () at 
../../content/app/content_main_runner_impl.cc:530
#14 RunServiceManager () at ../../content/app/content_main_runner_impl.cc:980
#15 0x036c3abc in Run () at ../../content/app/content_main_runner_impl.cc:879
#16 0x036c0f45 in RunEmbedderProcess () at 
../../content/app/content_service_manager_main_delegate.cc:52
#17 0x037338c0 in Main () at ../../services/service_manager/embedder/main.cc:454
#18 0x036c1e9d in content::ContentMain(content::ContentMainParams const&) () at 
../../content/app/content_main.cc:19
#19 0x00cffffc in ChromeMain () at ../../chrome/app/chrome_main.cc:110
#20 0x00cfff0f in main () at ../../chrome/app/chrome_exe_main_aura.cc:17
(gdb) thread apply all backtrace

Thread 35 (Thread 0xa84b6b40 (LWP 16501)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911d66 in futex_reltimed_wait_cancelable (private=<optimized out>, 
reltime=0xa84b5df0, expected=0, futex_word=0xa84b5efc) at 
../sysdeps/unix/sysv/linux/futex-internal.h:142
#2  __pthread_cond_wait_common (abstime=0xa84b5e50, mutex=0xa84b5ebc, 
cond=0xa84b5ed4) at pthread_cond_wait.c:533
#3  __pthread_cond_timedwait (cond=0xa84b5ed4, mutex=0xa84b5ebc, 
abstime=0xa84b5e50) at pthread_cond_wait.c:667
#4  0x00b6dea5 in TimedWait () at 
../../base/synchronization/condition_variable_posix.cc:127
#5  0x00b6e26b in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:213
#6  0x03c877b2 in WaitForWork () at 
../../base/task/thread_pool/worker_thread.cc:36
#7  0x03c881d1 in RunWorker () at 
../../base/task/thread_pool/worker_thread.cc:334
#8  0x03c87dd5 in base::internal::WorkerThread::RunPooledWorker() () at 
../../base/task/thread_pool/worker_thread.cc:224
#9  0x03c87c8e in ThreadMain () at 
../../base/task/thread_pool/worker_thread.cc:203
#10 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#11 0xb790b3bd in start_thread (arg=0xa84b6b40) at pthread_create.c:463
#12 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 33 (Thread 0xacf5eb40 (LWP 16485)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911d66 in futex_reltimed_wait_cancelable (private=<optimized out>, 
reltime=0xacf5ddf0, expected=0, futex_word=0xacf5defc) at 
../sysdeps/unix/sysv/linux/futex-internal.h:142
#2  __pthread_cond_wait_common (abstime=0xacf5de50, mutex=0xacf5debc, 
cond=0xacf5ded4) at pthread_cond_wait.c:533
#3  __pthread_cond_timedwait (cond=0xacf5ded4, mutex=0xacf5debc, 
abstime=0xacf5de50) at pthread_cond_wait.c:667
#4  0x00b6dea5 in TimedWait () at 
../../base/synchronization/condition_variable_posix.cc:127
#5  0x00b6e26b in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:213
#6  0x03c877b2 in WaitForWork () at 
../../base/task/thread_pool/worker_thread.cc:36
#7  0x03c881d1 in RunWorker () at 
../../base/task/thread_pool/worker_thread.cc:334
#8  0x03c87dd5 in base::internal::WorkerThread::RunPooledWorker() () at 
../../base/task/thread_pool/worker_thread.cc:224
#9  0x03c87c8e in ThreadMain () at 
../../base/task/thread_pool/worker_thread.cc:203
#10 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#11 0xb790b3bd in start_thread (arg=0xacf5eb40) at pthread_create.c:463
#12 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 28 (Thread 0xa19feb40 (LWP 16336)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xa19fde1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xa19fdddc, cond=0xa19fddf4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xa19fddf4, mutex=0xa19fdddc) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03bd900b in Run () at ../../base/message_loop/message_pump_default.cc:55
#8  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#9  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#10 0x03bfce17 in Run () at ../../base/run_loop.cc:124
#11 0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#12 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#13 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#14 0xb790b3bd in start_thread (arg=0xa19feb40) at pthread_create.c:463
#15 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 25 (Thread 0xa4a5eb40 (LWP 16301)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb6189263 in epoll_wait (epfd=74, events=0xae80c4f0, maxevents=32, 
timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#2  0x00b777ed in epoll_dispatch () at 
../../base/third_party/libevent/epoll.c:198
#3  0x00b77109 in event_base_loop () at 
../../base/third_party/libevent/event.c:512
#4  0x00b6ed29 in Run () at ../../base/message_loop/message_pump_libevent.cc:257
#5  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#6  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#7  0x03bfce17 in Run () at ../../base/run_loop.cc:124
#8  0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#9  0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#10 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#11 0xb790b3bd in start_thread (arg=0xa4a5eb40) at pthread_create.c:463
#12 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 24 (Thread 0xa58bdb40 (LWP 16278)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xa58bce1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xa58bcddc, cond=0xa58bcdf4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xa58bcdf4, mutex=0xa58bcddc) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03bd900b in Run () at ../../base/message_loop/message_pump_default.cc:55
#8  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#9  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#10 0x03bfce17 in Run () at ../../base/run_loop.cc:124
#11 0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#12 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#13 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#14 0xb790b3bd in start_thread (arg=0xa58bdb40) at pthread_create.c:463
#15 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 22 (Thread 0xa8e34b40 (LWP 16260)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xa8e33e1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xa8e33ddc, cond=0xa8e33df4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xa8e33df4, mutex=0xa8e33ddc) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03bd900b in Run () at ../../base/message_loop/message_pump_default.cc:55
#8  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#9  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#10 0x03bfce17 in Run () at ../../base/run_loop.cc:124
#11 0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#12 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#13 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#14 0xb790b3bd in start_thread (arg=0xa8e34b40) at pthread_create.c:463
#15 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 21 (Thread 0xa9eb7b40 (LWP 16257)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb6189263 in epoll_wait (epfd=56, events=0xb0d2d1e0, maxevents=32, 
timeout=30000) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#2  0x00b777ed in epoll_dispatch () at 
../../base/third_party/libevent/epoll.c:198
#3  0x00b77109 in event_base_loop () at 
../../base/third_party/libevent/event.c:512
#4  0x00b6edfa in Run () at ../../base/message_loop/message_pump_libevent.cc:257
#5  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#6  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#7  0x03bfce17 in Run () at ../../base/run_loop.cc:124
#8  0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#9  0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#10 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#11 0xb790b3bd in start_thread (arg=0xa9eb7b40) at pthread_create.c:463
#12 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 20 (Thread 0xaa6b8b40 (LWP 16256)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xaa6b7e1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xaa6b7ddc, cond=0xaa6b7df4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xaa6b7df4, mutex=0xaa6b7ddc) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03bd900b in Run () at ../../base/message_loop/message_pump_default.cc:55
#8  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#9  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#10 0x03bfce17 in Run () at ../../base/run_loop.cc:124
#11 0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#12 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#13 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#14 0xb790b3bd in start_thread (arg=0xaa6b8b40) at pthread_create.c:463
#15 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 19 (Thread 0xa96b6b40 (LWP 16258)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xa96b5ecc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xa96b5e8c, cond=0xa96b5ea4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xa96b5ea4, mutex=0xa96b5e8c) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03c877a4 in WaitForWork () at 
../../base/task/thread_pool/worker_thread.cc:34
#8  0x03c881d1 in RunWorker () at 
../../base/task/thread_pool/worker_thread.cc:334
#9  0x03c87e15 in base::internal::WorkerThread::RunSharedWorker() () at 
../../base/task/thread_pool/worker_thread.cc:236
#10 0x03c87cc5 in ThreadMain () at 
../../base/task/thread_pool/worker_thread.cc:206
#11 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#12 0xb790b3bd in start_thread (arg=0xa96b6b40) at pthread_create.c:463
#13 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 18 (Thread 0xaaeb9b40 (LWP 16255)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xaaeb8ecc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xaaeb8e8c, cond=0xaaeb8ea4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xaaeb8ea4, mutex=0xaaeb8e8c) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03c877a4 in WaitForWork () at 
../../base/task/thread_pool/worker_thread.cc:34
#8  0x03c881d1 in RunWorker () at 
../../base/task/thread_pool/worker_thread.cc:334
#9  0x03c87e55 in base::internal::WorkerThread::RunDedicatedWorker() () at 
../../base/task/thread_pool/worker_thread.cc:248
#10 0x03c87cbb in ThreadMain () at 
../../base/task/thread_pool/worker_thread.cc:209
#11 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#12 0xb790b3bd in start_thread (arg=0xaaeb9b40) at pthread_create.c:463
#13 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 17 (Thread 0xab6dbb40 (LWP 16254)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xab6dae1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xab6daddc, cond=0xab6dadf4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xab6dadf4, mutex=0xab6daddc) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03bd900b in Run () at ../../base/message_loop/message_pump_default.cc:55
#8  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#9  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#10 0x03bfce17 in Run () at ../../base/run_loop.cc:124
#11 0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#12 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#13 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#14 0xb790b3bd in start_thread (arg=0xab6dbb40) at pthread_create.c:463
#15 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 16 (Thread 0xabf5cb40 (LWP 16253)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0x9cb6f50) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0x9cb6eec, cond=0x9cb6f24) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0x9cb6f24, mutex=0x9cb6eec) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x04a201fd in non-virtual thunk to cc::SingleThreadTaskGraphRunner::Run() 
() at ../../cc/raster/single_thread_task_graph_runner.cc:123
#6  0x03c2cab6 in base::DelegateSimpleThread::Run() () at 
../../base/threading/simple_thread.cc:98
#7  0x03c2c915 in base::SimpleThread::ThreadMain() () at 
../../base/threading/simple_thread.cc:75
#8  0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#9  0xb790b3bd in start_thread (arg=0xabf5cb40) at pthread_create.c:463
#10 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 13 (Thread 0xae90cb40 (LWP 16250)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb79158f7 in __libc_read (fd=42, buf=0xae90c050, nbytes=4) at 
../sysdeps/unix/sysv/linux/read.c:27
#2  0x027b5e80 in ThreadMain () at 
../../chrome/app/shutdown_signal_handlers_posix.cc:135
#3  0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#4  0xb790b3bd in start_thread (arg=0xae90cb40) at pthread_create.c:463
#5  0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 12 (Thread 0xad75fb40 (LWP 16249)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb6189263 in epoll_wait (epfd=36, events=0xb0c02ab0, maxevents=32, 
timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#2  0x00b777ed in epoll_dispatch () at 
../../base/third_party/libevent/epoll.c:198
#3  0x00b77109 in event_base_loop () at 
../../base/third_party/libevent/event.c:512
#4  0x00b6ed29 in Run () at ../../base/message_loop/message_pump_libevent.cc:257
#5  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#6  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#7  0x03bfce17 in Run () at ../../base/run_loop.cc:124
#8  0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#9  0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#10 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#11 0xb790b3bd in start_thread (arg=0xad75fb40) at pthread_create.c:463
#12 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 11 (Thread 0xadfc2b40 (LWP 16248)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb617e43b in __GI___poll (fds=0x9d8b2d0, nfds=2, timeout=-1) at 
../sysdeps/unix/sysv/linux/poll.c:29
#2  0xb75eb7d0 in g_poll () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb75dc26a in ?? () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb75dc6b9 in g_main_loop_run () from 
/usr/lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb71071c5 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb760467a in ?? () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb790b3bd in start_thread (arg=0xadfc2b40) at pthread_create.c:463
#8  0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 10 (Thread 0xae7c3b40 (LWP 16247)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb617e43b in __GI___poll (fds=0x9d82300, nfds=1, timeout=-1) at 
../sysdeps/unix/sysv/linux/poll.c:29
#2  0xb75eb7d0 in g_poll () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb75dc26a in ?? () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb75dc3b4 in g_main_context_iteration () from 
/usr/lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb75dc410 in ?? () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb760467a in ?? () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb790b3bd in start_thread (arg=0xae7c3b40) at pthread_create.c:463
#8  0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 9 (Thread 0xaf1feb40 (LWP 16246)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7911810 in futex_wait_cancelable (private=<optimized out>, expected=0, 
futex_word=0xaf1fde1c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#2  __pthread_cond_wait_common (abstime=0x0, mutex=0xaf1fdddc, cond=0xaf1fddf4) 
at pthread_cond_wait.c:502
#3  __pthread_cond_wait (cond=0xaf1fddf4, mutex=0xaf1fdddc) at 
pthread_cond_wait.c:655
#4  0x03c661f7 in Wait () at 
../../base/synchronization/condition_variable_posix.cc:75
#5  0x00b6e2ae in TimedWait () at 
../../base/synchronization/waitable_event_posix.cc:211
#6  0x03c66611 in Wait () at 
../../base/synchronization/waitable_event_posix.cc:157
#7  0x03bd900b in Run () at ../../base/message_loop/message_pump_default.cc:55
#8  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#9  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#10 0x03bfce17 in Run () at ../../base/run_loop.cc:124
#11 0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#12 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#13 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#14 0xb790b3bd in start_thread (arg=0xaf1feb40) at pthread_create.c:463
#15 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 8 (Thread 0xaf9ffb40 (LWP 16245)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb6181303 in __GI___select (nfds=25, readfds=0xaf9fef80, writefds=0x0, 
exceptfds=0x0, timeout=0x0) at ../sysdeps/unix/sysv/linux/select.c:41
#2  0x03c6b978 in ThreadMain () at 
../../base/files/file_path_watcher_linux.cc:276
#3  0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#4  0xb790b3bd in start_thread (arg=0xaf9ffb40) at pthread_create.c:463
#5  0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 7 (Thread 0xb03feb40 (LWP 16244)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb6189263 in epoll_wait (epfd=26, events=0xb0d012f0, maxevents=32, 
timeout=37924) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#2  0x00b777ed in epoll_dispatch () at 
../../base/third_party/libevent/epoll.c:198
#3  0x00b77109 in event_base_loop () at 
../../base/third_party/libevent/event.c:512
#4  0x00b6edfa in Run () at ../../base/message_loop/message_pump_libevent.cc:257
#5  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#6  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#7  0x03bfce17 in Run () at ../../base/run_loop.cc:124
#8  0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#9  0x01c5c460 in content::BrowserProcessSubThread::IOThreadRun(base::RunLoop*) 
() at ../../content/browser/browser_process_sub_thread.cc:144
#10 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#11 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#12 0xb790b3bd in start_thread (arg=0xb03feb40) at pthread_create.c:463
#13 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 4 (Thread 0xb1f39b40 (LWP 16241)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb6189263 in epoll_wait (epfd=19, events=0xb0e012e0, maxevents=32, 
timeout=89923) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#2  0x00b777ed in epoll_dispatch () at 
../../base/third_party/libevent/epoll.c:198
#3  0x00b77109 in event_base_loop () at 
../../base/third_party/libevent/event.c:512
#4  0x00b6edfa in Run () at ../../base/message_loop/message_pump_libevent.cc:257
#5  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#6  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#7  0x03bfce17 in Run () at ../../base/run_loop.cc:124
#8  0x03c2d37c in base::Thread::Run(base::RunLoop*) () at 
../../base/threading/thread.cc:309
#9  0x03c842dc in base::internal::ServiceThread::Run(base::RunLoop*) () at 
../../base/task/thread_pool/service_thread.cc:61
#10 0x03c2d555 in ThreadMain () at ../../base/threading/thread.cc:380
#11 0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#12 0xb790b3bd in start_thread (arg=0xb1f39b40) at pthread_create.c:463
#13 0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 3 (Thread 0xb39ffb40 (LWP 16240)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb7916e17 in __waitpid (pid=16237, stat_loc=0xb39fefe4, options=0) at 
../sysdeps/unix/sysv/linux/waitpid.c:28
#2  0x03c64f57 in WaitpidWithTimeout () at 
../../base/process/process_posix.cc:62
#3  WaitForExitWithTimeoutImpl () at ../../base/process/process_posix.cc:209
#4  WaitForExitWithTimeout () at ../../base/process/process_posix.cc:354
#5  0x03c6523e in WaitForExit () at ../../base/process/process_posix.cc:340
#6  0x03c62853 in ThreadMain () at ../../base/process/kill_posix.cc:149
#7  0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#8  0xb790b3bd in start_thread (arg=0xb39ffb40) at pthread_create.c:463
#9  0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 2 (Thread 0xb4358b40 (LWP 16234)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb617e43b in __GI___poll (fds=0xb4358010, nfds=2, timeout=-1) at 
../sysdeps/unix/sysv/linux/poll.c:29
#2  0x020365bd in Run () at ../../content/browser/sandbox_ipc_linux.cc:46
#3  0x03c2cab6 in base::DelegateSimpleThread::Run() () at 
../../base/threading/simple_thread.cc:98
#4  0x03c2c915 in base::SimpleThread::ThreadMain() () at 
../../base/threading/simple_thread.cc:75
#5  0x03c69521 in ThreadFunc () at 
../../base/threading/platform_thread_posix.cc:81
#6  0xb790b3bd in start_thread (arg=0xb4358b40) at pthread_create.c:463
#7  0xb6188e16 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108

Thread 1 (Thread 0xb512d7c0 (LWP 16230)):
#0  0xb7fd6d09 in __kernel_vsyscall ()
#1  0xb617e43b in __GI___poll (fds=0xa219950, nfds=5, timeout=8117) at 
../sysdeps/unix/sysv/linux/poll.c:29
#2  0xb75eb7d0 in g_poll () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb75dc26a in ?? () from /usr/lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb75dc3b4 in g_main_context_iteration () from 
/usr/lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x03bd9408 in Run () at ../../base/message_loop/message_pump_glib.cc:439
#6  0x03c20d33 in Run () at 
../../base/task/sequence_manager/thread_controller_with_message_pump_impl.cc:429
#7  0x03c20dd6 in non-virtual thunk to 
base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool,
 base::TimeDelta) () at ../../base/trace_event/trace_arguments.h:619
#8  0x03bfce17 in Run () at ../../base/run_loop.cc:124
#9  0x03abd23f in MainMessageLoopRun () at 
../../chrome/browser/chrome_browser_main.cc:1684
#10 0x01c57ed2 in RunMainMessageLoopParts () at 
../../content/browser/browser_main_loop.cc:1055
#11 0x01c5a542 in Run () at 
../../content/browser/browser_main_runner_impl.cc:150
#12 0x01c54b90 in BrowserMain () at ../../content/browser/browser_main.cc:47
#13 0x036c3ea4 in RunBrowserProcessMain () at 
../../content/app/content_main_runner_impl.cc:530
#14 RunServiceManager () at ../../content/app/content_main_runner_impl.cc:980
#15 0x036c3abc in Run () at ../../content/app/content_main_runner_impl.cc:879
#16 0x036c0f45 in RunEmbedderProcess () at 
../../content/app/content_service_manager_main_delegate.cc:52
#17 0x037338c0 in Main () at ../../services/service_manager/embedder/main.cc:454
#18 0x036c1e9d in content::ContentMain(content::ContentMainParams const&) () at 
../../content/app/content_main.cc:19
#19 0x00cffffc in ChromeMain () at ../../chrome/app/chrome_main.cc:110
#20 0x00cfff0f in main () at ../../chrome/app/chrome_exe_main_aura.cc:17
(gdb) quit
A debugging session is active.

        Inferior 1 [process 16230] will be killed.

Quit anyway? (y or n) 
Please answer y or n.
A debugging session is active.

        Inferior 1 [process 16230] will be killed.

Quit anyway? (y or n) y




** Attachment added: "gdb-chromium.txt"
   
https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1873013/+attachment/5355008/+files/gdb-chromium.txt

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https://bugs.launchpad.net/bugs/1873013

Title:
  Chromium 83.0.4103.7 is randomly crashing tab

Status in chromium-browser package in Ubuntu:
  Incomplete

Bug description:
  https://bugs.chromium.org/p/chromium/issues/detail?id=1071071
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: i386
  CasperVersion: 1.394
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  DRM.card0-DP-1:
   enabled: disabled
   dpms: Off
   status: disconnected
   edid-base64: 
   modes:
  DRM.card0-HDMI-A-1:
   enabled: disabled
   dpms: Off
   status: disconnected
   edid-base64: 
   modes:
  DRM.card0-HDMI-A-2:
   enabled: disabled
   dpms: Off
   status: disconnected
   edid-base64: 
   modes:
  DRM.card0-eDP-1:
   enabled: enabled
   dpms: On
   status: connected
   edid-base64: 
AP///////wAGrz0RAAAAABEXAQSVHxF4AoflpFZQniYNUFQAAAABAQEBAQEBAQEBAQEBAQEBFDeAuHA4JEAQED4ANa0QAAAaFDeAuHA4JEAQED4ANa0QAAAaAAAA/gBYVFJZOYBCMTQwSEFOAAAAAAAAQQKeAAAAAAoBCiAgAHg=
   modes: 1920x1080
  Desktop-Session:
   'ubuntustudio'
   '/etc/xdg/xdg-ubuntustudio:/etc/xdg:/etc/xdg'
   
'/usr/share/ubuntustudio:/usr/share/xfce4:/usr/local/share:/usr/share:/var/lib/snapd/desktop:/usr/share'
  DetectedPlugins:
   
  DistroRelease: Ubuntu 18.04
  Env:
   'None'
   'None'
  InstalledPlugins:
   
  LiveMediaBuild: Ubuntu-Studio 18.04 LTS "Bionic Beaver" - Release i386 
(20180426)
  Load-Avg-1min: 0.44
  Load-Processes-Running-Percent:   0.1%
  MachineType: Dell Inc. Latitude E7440
  NonfreeKernelModules: overlay
  Package: chromium-browser 83.0.4103.7-0ubuntu0.18.04.1 [origin: 
LP-PPA-chromium-team-dev]
  PackageArchitecture: i386
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true 
file=/cdrom/preseed/ubuntustudio.seed boot=casper initrd=/casper/initrd.lz 
quiet splash --- BOOT_IMAGE=/casper/vmlinuz
  ProcVersionSignature: Ubuntu 4.15.0-20.21-lowlatency 4.15.17
  Tags: third-party-packages bionic
  ThirdParty: True
  Uname: Linux 4.15.0-20-lowlatency i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 05/01/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A09
  dmi.board.name: 03HFCG
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA09:bd05/01/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn03HFCG:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  modified.conffile..etc.default.chromium-browser: [deleted]

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