eog crashed with SIGSEGV in g_mutex_lock()

Hi,

to reproduce this bug:

 - in eog load an image from a directory that contains several images
 - press F5

ProblemType: Crash
DistroRelease: Ubuntu 19.04
Package: eog 3.32.0-1
Uname: Linux 5.0.6-050006-generic x86_64
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Apr 4 11:41:28 2019
ExecutablePath: /usr/bin/eog
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
ProcCmdline: eog P1000443.jpg
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, no user)
SegvAnalysis:
 Segfault happened at: 0x7f53db0ce945 <g_mutex_lock+5>: lock xadd %eax,(%rdi)
 PC (0x7f53db0ce945) ok
 source "%eax" ok
 destination "(%rdi)" (0x7575757575757575) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: eog
StacktraceTop:
 g_mutex_lock (mutex=mutex@entry=0x7575757575757575) at ../../../glib/gthread-posix.c:1354
 g_source_destroy_internal (source=0x5611bb416f10, context=0x7575757575757575, have_lock=0) at ../../../glib/gmain.c:1219
 g_source_destroy (source=<optimized out>) at ../../../glib/gmain.c:1287
 slideshow_clear_timeout (window=window@entry=0x5611bb1637e0 [EogWindow]) at ../src/eog-window.c:1827
 slideshow_set_timeout (window=window@entry=0x5611bb1637e0 [EogWindow]) at ../src/eog-window.c:1840
Title: eog crashed with SIGSEGV in g_mutex_lock()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout kvm lpadmin lxd plugdev sambashare staff
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