I cant find message previous to reboot time in the "all message section
Here is the message from system log section, the crash happened at about 18:45 today.
Mar 14 17:01:14 Mac-Pro-de-paul- xpcproxy[1287]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
Mar 14 17:09:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 9002 seconds
Mar 14 17:09:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 9002 seconds
Mar 14 17:16:14 Mac-Pro-de-paul- xpcproxy[1312]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
Mar 14 17:19:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 8402 seconds
Mar 14 17:19:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 8402 seconds
Mar 14 17:29:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 7802 seconds
Mar 14 17:29:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 7802 seconds
Mar 14 17:29:47 Mac-Pro-de-paul-.local periodic-wrapper[1366]: Running daily periodic task.
Mar 14 17:29:54 Mac-Pro-de-paul-.local AvastSecureLine[1431]: Invalid color System, labelColor (warning given only once)
Mar 14 17:29:54 Mac-Pro-de-paul-.local AvastSecureLine[1431]: Cannot remove an observer <MainController 0x7fb86c203380> for the key path "connectedUnsecuredSSIDs" from <NetworkConnection 0x7fb86c3122e0> because it is not registered as an observer.
Mar 14 17:31:54 Mac-Pro-de-paul- xpcproxy[1438]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
Mar 14 17:39:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 7202 seconds
Mar 14 17:39:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 7202 seconds
Mar 14 17:49:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 6602 seconds
Mar 14 17:49:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 6602 seconds
Mar 14 17:50:14 Mac-Pro-de-paul- xpcproxy[1464]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
Mar 14 17:59:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 6002 seconds
Mar 14 17:59:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 6002 seconds
Mar 14 18:08:15 Mac-Pro-de-paul- xpcproxy[1488]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
Mar 14 18:09:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 5402 seconds
Mar 14 18:09:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 5402 seconds
Mar 14 18:19:34 Mac-Pro-de-paul-.local ntpd[56]: SYNC state ignoring +0.155531 s
Mar 14 18:19:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 4802 seconds
Mar 14 18:19:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 4802 seconds
Mar 14 18:26:14 Mac-Pro-de-paul- xpcproxy[1508]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
Mar 14 18:29:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 4202 seconds
Mar 14 18:29:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 4202 seconds
Mar 14 18:29:54 Mac-Pro-de-paul-.local AvastSecureLine[1552]: Invalid color System, labelColor (warning given only once)
Mar 14 18:29:54 Mac-Pro-de-paul-.local AvastSecureLine[1552]: Cannot remove an observer <MainController 0x7fad1850eb50> for the key path "connectedUnsecuredSSIDs" from <NetworkConnection 0x7fad1ab8bae0> because it is not registered as an observer.
Mar 14 18:39:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.secureline.update): Throttling respawn: Will start in 3602 seconds
Mar 14 18:39:36 Mac-Pro-de-paul- com.apple.launchd[1] (com.avast.update): Throttling respawn: Will start in 3602 seconds
Mar 14 18:44:15 Mac-Pro-de-paul- xpcproxy[1574]: assertion failed: 13F1603: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
Mar 14 18:51:12 localhost bootlog[0]: BOOT_TIME 1457977872 0
Does that help?
thx