[Bug 1386255] Re: devhelp and many other apps crash with SIGSEGV in g_closure_invoke() due to overlay-scrollbars

[Iain Lane]

Looks like this is only to call the pre hijacked one if not on os, so
probably OK and similar probably should be done for all of these
hijacked functions. Lars, could you look?

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Title:
  devhelp and many other apps crash with SIGSEGV in g_closure_invoke()
  due to overlay-scrollbars

Status in Overlay Scrollbar:
  New
Status in Ubuntu GNOME:
  New
Status in “overlay-scrollbar” package in Ubuntu:
  Confirmed

Bug description:
  With the gnome3-team/gnome3-staging PPA enabled all Gtk+ applications
  segfault when I do stuff like

  - Press the <Menu> key
  - Press the Save button in gedit's headerbar
  - Press the hamburger menu button in devhelp's headerbar (the stack trace attached to this bug)
  - Press the Add button in gtimelog
  - Try to open any of the regular menus in gtimelog

  ProblemType: Crash
  DistroRelease: Ubuntu 14.10
  Package: devhelp 3.14.0-1~utopic1 [origin: LP-PPA-gnome3-team-gnome3-staging]
  ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
  Uname: Linux 3.16.0-23-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Mon Oct 27 17:15:30 2014
  Disassembly: => 0x0:	Cannot access memory at address 0x0
  EcryptfsInUse: Yes
  ExecutablePath: /usr/bin/devhelp
  InstallationDate: Installed on 2012-07-25 (824 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  ProcCmdline: devhelp
  SegvAnalysis:
   Segfault happened at: 0x0:	Cannot access memory at address 0x0
   PC (0x00000000) not located in a known VMA region (needed executable region)!
  SegvReason: executing NULL VMA
  Signal: 11
  SourcePackage: devhelp
  StacktraceTop:
   ?? ()
   g_closure_invoke (closure=0x11e4ce0, return_value=0x0, n_param_values=2, param_values=0x7fffd6ed0920, invocation_hint=0x7fffd6ed08c0) at /build/buildd/glib2.0-2.42.0/./gobject/gclosure.c:768
   signal_emit_unlocked_R (node=node at entry=0x11e50b0, detail=detail at entry=0, instance=instance at entry=0x182a510, emission_return=emission_return at entry=0x0, instance_and_params=instance_and_params at entry=0x7fffd6ed0920) at /build/buildd/glib2.0-2.42.0/./gobject/gsignal.c:3483
   g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args at entry=0x7fffd6ed0ab0) at /build/buildd/glib2.0-2.42.0/./gobject/gsignal.c:3309
   g_signal_emit (instance=instance at entry=0x182a510, signal_id=<optimized out>, detail=detail at entry=0) at /build/buildd/glib2.0-2.42.0/./gobject/gsignal.c:3365
  Title: devhelp crashed with SIGSEGV in g_closure_invoke()
  UpgradeStatus: Upgraded to utopic on 2014-10-24 (3 days ago)
  UserGroups: adm cdrom dip docker libvirtd lp lpadmin plugdev sambashare shared sudo wireshark

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