Public bug reported:

When I updated to the latest version of networkmanager in disco dingo
(1.15.2-0ubuntu1), it started segfaulting.  Reverting to the version in
cosmic (1.12.4-1ubuntu1.2) solved the problem.

Syslog shows the following (will attach a more complete log):

feb 13 10:39:45 regan NetworkManager[2315]: 
NetworkManager:ERROR:src/settings/nm-settings-plugin.c:147:_nm_settings_plugin_emit_signal_connection_added:
 assertion failed: ((((__extension__ ({ GTypeInstance *__inst = 
(GTypeInstance*) ((sett_conn)); GType __t = ((nm_settings_connection_get_type 
())); gboolean __r; if (!__inst) __r = (0); else if (__inst->g_class && 
__inst->g_class->g_type == __t) __r = (!(0)); else __r = 
g_type_check_instance_is_a (__inst, __t); __r; })))))
feb 13 10:39:45 regan NetworkManager[2315]: <info>  [1550050785.3612] ifupdown: 
management mode: managed
feb 13 10:39:45 regan NetworkManager[2315]: invalid uninstantiatable type 
'(null)' in cast to 'NMSettingsConnection'
feb 13 10:39:45 regan systemd[1]: NetworkManager.service: Main process exited, 
code=dumped, status=6/ABRT
--- 
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu20
Architecture: amd64
CurrentDesktop: GNOME
DistroRelease: Ubuntu 19.04
InstallationDate: Installed on 2016-12-22 (782 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
Package: network-manager 1.12.4-1ubuntu1.2
PackageArchitecture: amd64
Tags:  disco
Uname: Linux 4.19.0-1-amd64 x86_64
UpgradeStatus: Upgraded to disco on 2017-09-18 (512 days ago)
UserGroups: adm cdrom dialout dip docker libvirt lp lpadmin lxd plugdev 
sambashare scanner src sudo tss wireshark
_MarkForUpload: True
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 
2018-06-01T16:38:44.962715
nmcli-nm:
 RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  WIFI  
   WWAN-HW  WWAN    
 running  1.12.4   connected  started  full          enabled     enabled  
enabled  enabled  enabled

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-collected disco

** Attachment added: "network-manager journal output during upgrade"
   
https://bugs.launchpad.net/bugs/1815742/+attachment/5238246/+files/journal.txt

** Tags added: apport-collected disco

** Description changed:

  When I updated to the latest version of networkmanager in disco dingo
  (1.15.2-0ubuntu1), it started segfaulting.  Reverting to the version in
  cosmic (1.12.4-1ubuntu1.2) solved the problem.
  
  Syslog shows the following (will attach a more complete log):
  
  feb 13 10:39:45 regan NetworkManager[2315]: 
NetworkManager:ERROR:src/settings/nm-settings-plugin.c:147:_nm_settings_plugin_emit_signal_connection_added:
 assertion failed: ((((__extension__ ({ GTypeInstance *__inst = 
(GTypeInstance*) ((sett_conn)); GType __t = ((nm_settings_connection_get_type 
())); gboolean __r; if (!__inst) __r = (0); else if (__inst->g_class && 
__inst->g_class->g_type == __t) __r = (!(0)); else __r = 
g_type_check_instance_is_a (__inst, __t); __r; })))))
  feb 13 10:39:45 regan NetworkManager[2315]: <info>  [1550050785.3612] 
ifupdown: management mode: managed
  feb 13 10:39:45 regan NetworkManager[2315]: invalid uninstantiatable type 
'(null)' in cast to 'NMSettingsConnection'
  feb 13 10:39:45 regan systemd[1]: NetworkManager.service: Main process 
exited, code=dumped, status=6/ABRT
+ --- 
+ ProblemType: Bug
+ ApportVersion: 2.20.10-0ubuntu20
+ Architecture: amd64
+ CurrentDesktop: GNOME
+ DistroRelease: Ubuntu 19.04
+ InstallationDate: Installed on 2016-12-22 (782 days ago)
+ InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
+ NetworkManager.state:
+  [main]
+  NetworkingEnabled=true
+  WirelessEnabled=true
+  WWANEnabled=true
+ Package: network-manager 1.12.4-1ubuntu1.2
+ PackageArchitecture: amd64
+ Tags:  disco
+ Uname: Linux 4.19.0-1-amd64 x86_64
+ UpgradeStatus: Upgraded to disco on 2017-09-18 (512 days ago)
+ UserGroups: adm cdrom dialout dip docker libvirt lp lpadmin lxd plugdev 
sambashare scanner src sudo tss wireshark
+ _MarkForUpload: True
+ mtime.conffile..etc.NetworkManager.NetworkManager.conf: 
2018-06-01T16:38:44.962715
+ nmcli-nm:
+  RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI     WWAN-HW  WWAN    
+  running  1.12.4   connected  started  full          enabled     enabled  
enabled  enabled  enabled

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1815742

Title:
  latest network-manager segfaults in disco

Status in network-manager package in Ubuntu:
  New

Bug description:
  When I updated to the latest version of networkmanager in disco dingo
  (1.15.2-0ubuntu1), it started segfaulting.  Reverting to the version
  in cosmic (1.12.4-1ubuntu1.2) solved the problem.

  Syslog shows the following (will attach a more complete log):

  feb 13 10:39:45 regan NetworkManager[2315]: 
NetworkManager:ERROR:src/settings/nm-settings-plugin.c:147:_nm_settings_plugin_emit_signal_connection_added:
 assertion failed: ((((__extension__ ({ GTypeInstance *__inst = 
(GTypeInstance*) ((sett_conn)); GType __t = ((nm_settings_connection_get_type 
())); gboolean __r; if (!__inst) __r = (0); else if (__inst->g_class && 
__inst->g_class->g_type == __t) __r = (!(0)); else __r = 
g_type_check_instance_is_a (__inst, __t); __r; })))))
  feb 13 10:39:45 regan NetworkManager[2315]: <info>  [1550050785.3612] 
ifupdown: management mode: managed
  feb 13 10:39:45 regan NetworkManager[2315]: invalid uninstantiatable type 
'(null)' in cast to 'NMSettingsConnection'
  feb 13 10:39:45 regan systemd[1]: NetworkManager.service: Main process 
exited, code=dumped, status=6/ABRT
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.10-0ubuntu20
  Architecture: amd64
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 19.04
  InstallationDate: Installed on 2016-12-22 (782 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
  Package: network-manager 1.12.4-1ubuntu1.2
  PackageArchitecture: amd64
  Tags:  disco
  Uname: Linux 4.19.0-1-amd64 x86_64
  UpgradeStatus: Upgraded to disco on 2017-09-18 (512 days ago)
  UserGroups: adm cdrom dialout dip docker libvirt lp lpadmin lxd plugdev 
sambashare scanner src sudo tss wireshark
  _MarkForUpload: True
  mtime.conffile..etc.NetworkManager.NetworkManager.conf: 
2018-06-01T16:38:44.962715
  nmcli-nm:
   RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI     WWAN-HW  WWAN    
   running  1.12.4   connected  started  full          enabled     enabled  
enabled  enabled  enabled

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