celluloid crashed with SIGSEGV in g_str_hash()

[Joshua Peisach]

Launched some .ogg or .sga or .oga files, trying to add some new Cinnamon sounds, and all of a sudden I got the error message from Celluloid. Unsure what happened, but this happened.

ProblemType: Crash
DistroRelease: Ubuntu 20.04
Package: celluloid 0.18-2build1
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu24
Architecture: amd64
CrashCounter: 1
CurrentDesktop: X-Cinnamon
Date: Tue Apr 7 11:43:30 2020
ExecutablePath: /usr/bin/celluloid
InstallationDate: Installed on 2020-04-07 (0 days ago)
InstallationMedia: cinnamon-remix 20.04 "focal" - all amd64 (20200401)
ProcCmdline: /usr/bin/celluloid --gapplication-service
SegvAnalysis:
 Segfault happened at: 0x7f1a7fb0e494 <g_str_hash+4>: movsbl (%rdi),%eax
 PC (0x7f1a7fb0e494) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: celluloid
StacktraceTop:
 g_str_hash () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_hash_table_lookup () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
 g_closure_invoke () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: celluloid crashed with SIGSEGV in g_str_hash()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sudo
separator:

[Apport retracing service (apport)]

StacktraceTop:
 g_str_hash () from /tmp/apport_sandbox_rkirobsh/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.1
 g_hash_table_lookup () from /tmp/apport_sandbox_rkirobsh/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.1
 mpv_event_notify (event_id=8, event_data=<optimized out>, data=0x55a8c1278340, mpv=0x55a8c0fd9560) at celluloid-metadata-cache.c:156
 mpv_event_notify (mpv=0x55a8c0fd9560, event_id=<optimized out>, event_data=<optimized out>, data=0x55a8c1278340) at celluloid-metadata-cache.c:140
 g_closure_invoke () from /tmp/apport_sandbox_rkirobsh/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.1

[arno (star-gmx)]

Same here (mpv and celluloid crash) - from one day to another (caused by an update?)

[Joshua Peisach (itzswirlz)]

I actually haven't seem to get the issue again. Possibly a glitch?

[arno (star-gmx)]

I just reinstalled Ubuntu Mate 20.04. It is working. After apply updates it crashes. So there must be something serious happen during update.
BTW: Audio part is not affected "mpv --no-video" is working.

[arno (star-gmx)]

I am a bit disappointed of no progress here. Pushed system to recent state - kernel 5.4.0-40 and other updates.

Issue keeps. I think that at least all Sandylake chips are suffered.
My workaround so far is adding
"MESA_LOADER_DRIVER_OVERRIDE=i965"
to ~/.profile

(Old OpenGL Driver (i965)
As of Mesa 19.2, a new OpenGL driver, Iris, is available for testing. In Mesa 20.0, the Iris driver is promoted to be the default for Gen8+. Certain applications run faster with it. You may disable it and revert to use the old i965 driver by setting the MESA_LOADER_DRIVER_OVERRIDE=i965 environment variable before starting any OpenGL application. This setting does not affect Vulkan applications.)
@ https://wiki.archlinux.org/index.php/Intel_graphics

The other issue with Skylake is a screen flickering after resume/suspend.

[arno (star-gmx)]

Guess I found the reason for this misbehaviour. To use xbacklight I changed a X11 config file and started the intel driver instead of the standard modesetting driver. This causes the issue. Back to standard driver mpv/celluloid runs without the above workaround.