[Bug 1746874] Re: gnome-shell and Xwayland sometimes leave $HOME/core files (should be /var/crash files)

[Julian Andres Klode]

So, what we're seeing is that 1657 ended, but 1941 and 1946 started at
the same time, roughly. hence 1941 got the lock and 1946 not. The run of
1657 took less than 20 seconds, so it seems to me 30 seconds are
probably fine, but we can go up to a minute.

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Title:
  gnome-shell and Xwayland sometimes leave $HOME/core files (should be
  /var/crash files)

Status in apport package in Ubuntu:
  Triaged
Status in apport source package in Bionic:
  Triaged

Bug description:
  gnome-shell and Xwayland sometimes leave $HOME/core files (should be
  /var/crash files). This issue was first mentioned in bug 1746653. But
  then I noticed my machine doing it too...

  This is despite:

  $ grep . /proc/sys/kernel/core_*
  /proc/sys/kernel/core_pattern:|/usr/share/apport/apport %p %s %c %d %P
  /proc/sys/kernel/core_pipe_limit:0
  /proc/sys/kernel/core_uses_pid:0

  So really there are two problems:

  1. ~/core files are created but no /var/crash/ files
  2. Because they all have the same name (core_uses_pid == 0), when gnome-shell crashes as a result of an Xwayland crash, you can only get the core from one of them at most.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.26.2-0ubuntu2
  ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13
  Uname: Linux 4.13.0-25-generic x86_64
  ApportVersion: 2.20.8-0ubuntu7
  Architecture: amd64
  Date: Fri Feb  2 15:13:52 2018
  DisplayManager:

  InstallationDate: Installed on 2017-12-12 (52 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171211)
  SourcePackage: gnome-shell
  UpgradeStatus: No upgrade log present (probably fresh install)
  ---
  ApportVersion: 2.20.8-0ubuntu7
  Architecture: amd64
  CrashReports:
   640:1000:118:3122469:2018-01-29 16:25:03.658845409 +0800:2018-02-02 15:39:18.799970611 +0800:/var/crash/_usr_bin_Xwayland.1000.crash
   640:1000:118:24558024:2018-01-29 16:22:23.127058238 +0800:2018-02-02 15:39:18.887970685 +0800:/var/crash/_usr_bin_gdb.1000.crash
   640:120:118:23982380:2018-01-29 15:52:09.799486456 +0800:2018-01-29 15:51:51.467493515 +0800:/var/crash/_usr_bin_gnome-shell.120.crash
   640:1000:118:6315115:2018-01-29 16:18:12.723424671 +0800:2018-01-29 16:18:10.555428082 +0800:/var/crash/_usr_bin_gnome-shell.1000.crash
   640:120:118:3103046:2018-01-29 15:52:12.923485257 +0800:2018-01-29 15:52:09.859486433 +0800:/var/crash/_usr_bin_Xwayland.120.crash
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2017-12-12 (52 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171211)
  Package: mutter
  PackageArchitecture: all
  ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13
  Tags:  bionic
  Uname: Linux 4.13.0-25-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True

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