Confirmed, but the number of crash reports is incredibly low right now:

artful = 1
bionic = 1
cosmic = 1
disco = 1

Also it sounds like a memory corruption issue. So the location it
crashed in may not be the problem at all. If you are able to ever
reproduce the issue then please try adding this to your /etc/environment
first:

  MALLOC_CHECK_=3

Then produce the same crash and that should give a better idea of the
root cause.

** Changed in: totem (Ubuntu)
       Status: Expired => Confirmed

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to totem in Ubuntu.
https://bugs.launchpad.net/bugs/1814088

Title:
  totem crashed with SIGSEGV in tcache_get() [assertion "nqueue != NULL"
  failed in g_object_new_internal]

Status in totem package in Ubuntu:
  Confirmed

Bug description:
  https://errors.ubuntu.com/problem/e6f21a21cd523f0c489de07464069cea59d69427

  I made no attempt to run Videos. This just came up out of the blue.
  Maybe a video embedded in Tweetdeck tried to trigger it? (Firefox
  66.0b4 from firefox-next ppa, installed for the working CSD when
  buttons on left.)

  ProblemType: Crash
  DistroRelease: Ubuntu 19.04
  Package: totem 3.30.0-4ubuntu1
  ProcVersionSignature: Ubuntu 4.18.0-13.14-generic 4.18.17
  Uname: Linux 4.18.0-13-generic x86_64
  ApportVersion: 2.20.10-0ubuntu19
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jan 23 13:41:15 2019
  ExecutablePath: /usr/bin/totem
  InstallationDate: Installed on 2018-09-11 (141 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180214)
  ProcCmdline: /usr/bin/totem --gapplication-service
  ProcEnviron:
   XDG_RUNTIME_DIR=<set>
   SHELL=/bin/bash
   LANGUAGE=en_GB:en
   PATH=(custom, user)
   LANG=en_GB.UTF-8
  SegvAnalysis:
   Segfault happened at: 0x7f609e404d36 <__GI___libc_malloc+422>:       mov    
(%rdx),%rsi
   PC (0x7f609e404d36) ok
   source "(%rdx)" (0x561c1b1ae92000) not located in a known VMA region (needed 
readable region)!
   destination "%rsi" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: totem
  StacktraceTop:
   tcache_get (tc_idx=1) at malloc.c:2927
   __GI___libc_malloc (bytes=35) at malloc.c:3034
   g_malloc () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_strconcat () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_assertion_message_expr () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  Title: totem crashed with SIGSEGV in tcache_get()
  UpgradeStatus: Upgraded to disco on 2019-01-13 (17 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  XorgLog: Error: [Errno 2] No such file or directory: '/var/log/Xorg.0.log'

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