lightdm-webkit-greeter crashed with SIGSEGV in __libc_read()

[Leonardo Müller]

The login screen is subpar as it lacks many options and, when logging in Xubuntu 18.10, the webkit-greeter window appears for a few seconds and then crashes.

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: lightdm-webkit-greeter 0.1.2-0ubuntu4
ProcVersionSignature: Ubuntu 4.17.0-6.7-generic 4.17.9
Uname: Linux 4.17.0-6-generic x86_64
ApportVersion: 2.20.10-0ubuntu7
Architecture: amd64
CrashCounter: 1
Date: Fri Aug 10 22:03:51 2018
ExecutablePath: /usr/bin/lightdm-webkit-greeter
InstallationDate: Installed on 2018-06-21 (50 days ago)
InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180619)
ProcCmdline: /usr/bin/lightdm-webkit-greeter
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pt_BR.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x7f2029735ff6 <__run_exit_handlers+294>: mov 0x10(%rax),%rdx
 PC (0x7f2029735ff6) ok
 source "0x10(%rax)" (0x103979346acaa0) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: lightdm-webkit-greeter
StacktraceTop:
 __libc_read (fd=12, buf=0x5573feb1e1b0, nbytes=1024) at ../sysdeps/unix/sysv/linux/read.c:27
 ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_io_channel_read_chars () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/liblightdm-gobject-1.so.0
Title: lightdm-webkit-greeter crashed with SIGSEGV in __libc_read()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __libc_read (fd=12, buf=buf@entry=0x5573feb1e1b0, nbytes=nbytes@entry=1024) at ../sysdeps/unix/sysv/linux/read.c:27
 read (__nbytes=1024, __buf=0x5573feb1e1b0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
 g_io_unix_read (channel=0x5573feb1d120, buf=0x5573feb1e1b0 "", count=1024, bytes_read=0x7ffe2ef55f80, err=0x7ffe2ef56060) at ../../../../glib/giounix.c:192
 g_io_channel_fill_buffer (channel=channel@entry=0x5573feb1d120, err=err@entry=0x7ffe2ef56060) at ../../../../glib/giochannel.c:1477
 g_io_channel_read_chars (channel=0x5573feb1d120, buf=0x7f1fc400fed0 "\300\221\277\376sU", count=8, bytes_read=bytes_read@entry=0x7ffe2ef56058, error=error@entry=0x7ffe2ef56060) at ../../../../glib/giochannel.c:2026