Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: gnome-shell (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1792573

Title:
  gnome-shell assert failure: gnome-shell: ../src/evdev-mt-
  touchpad.c:1541: tp_detect_thumb_while_moving: Assertion failed:
  "first"

Status in gnome-shell package in Ubuntu:
  Confirmed
Status in libinput package in Ubuntu:
  Confirmed

Bug description:
  Gnome Shell Wayland session crash twice while Logitech Touchpad T650
  was used for scrolling.

  ProblemType: Crash
  DistroRelease: Ubuntu 18.10
  Package: gnome-shell 3.30.0-1ubuntu2
  Uname: Linux 4.18.3-041803-generic x86_64
  ApportVersion: 2.20.10-0ubuntu9
  Architecture: amd64
  AssertionMessage: gnome-shell: ../src/evdev-mt-touchpad.c:1541: 
tp_detect_thumb_while_moving: Проверочное утверждение «first» не выполнено.
  CurrentDesktop: GNOME
  Date: Fri Sep 14 20:23:37 2018
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  InstallationDate: Installed on 2018-04-20 (147 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
  ProcCmdline: /usr/bin/gnome-shell
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=ru_RU.UTF-8
   SHELL=/bin/bash
  Signal: 6
  SourcePackage: gnome-shell
  StacktraceTop:
   __assert_fail_base (fmt=0x7f6078627622 <error: Cannot access memory at 
address 0x7f6078627622>, assertion=0x7f6080918903 "first", file=0x7f60809187c4 
"../src/evdev-mt-touchpad.c", line=1541, function=<optimized out>) at 
assert.c:92
   __GI___assert_fail (assertion=0x7f6080918903 "first", file=0x7f60809187c4 
"../src/evdev-mt-touchpad.c", line=1541, function=0x7f60809191a0 
"tp_detect_thumb_while_moving") at assert.c:101
   ?? () from /usr/lib/x86_64-linux-gnu/libinput.so.10
   ?? () from /usr/lib/x86_64-linux-gnu/libinput.so.10
   ?? () from /usr/lib/x86_64-linux-gnu/libinput.so.10
  Title: gnome-shell assert failure: gnome-shell: 
../src/evdev-mt-touchpad.c:1541: tp_detect_thumb_while_moving: Проверочное 
утверждение «first» не выполнено.
  UpgradeStatus: Upgraded to cosmic on 2018-04-20 (147 days ago)
  UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo tty

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