This is the Console text for SYSTEM.LOG  around time of crash:
Jan  2 11:53:19 Geirs-Mac-mini diagnosticd[4230]: System mode client started - Console (4233) - mode: 0xb, filter: "<empty>"
Jan  2 11:53:32 Geirs-Mac-mini com.apple.xpc.launchd[1] (com.apple.mdworker.shared.04000000-0400-0000-0000-000000000000[4232]): Service exited due to SIGKILL | sent by mds[146]
Jan  2 11:54:02 Geirs-Mac-mini com.apple.xpc.launchd[1] (com.apple.CloudDocs.MobileDocumentsFileProvider[4236]): Extension is hanging on launch. Killing.
Jan  2 11:54:02 Geirs-Mac-mini com.apple.xpc.launchd[1] (com.apple.CloudDocs.MobileDocumentsFileProvider[4236]): Extension did not initialize in time.
Jan  2 11:54:14 Geirs-Mac-mini Console[4233]: BUG in libdispatch client: vnode, monitored resource vanished before the source cancel handler was invoked { 0x600002cc5600[source], ident: 12 / 0xc, handler: 0x7fff4a9dd5d4 }
Jan  2 11:54:27 Geirs-Mac-mini MusicCacheExtension[4238]: objc[4238]: Class PDFToRasterImageRef is implemented in both /System/Library/PrivateFrameworks/AMPLibrary.framework/Versions/A/AMPLibrary and /System/Applications/Music.app/Contents/PlugIns/MusicCacheExtension.appex/Contents/MacOS/MusicCacheExtension. One of the two will be used. Which one is undefined.
Jan  2 11:54:31 Geirs-Mac-mini TVCacheExtension[4239]: objc[4239]: Class PDFToRasterImageRef is implemented in both /System/Library/PrivateFrameworks/AMPLibrary.framework/Versions/A/AMPLibrary and /System/Applications/TV.app/Contents/PlugIns/TVCacheExtension.appex/Contents/MacOS/TVCacheExtension. One of the two will be used. Which one is undefined.
Jan  2 11:55:58 localhost bootlog[0]: BOOT_TIME 1609584958 0
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.cdscheduler" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.install" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.callhistory.asl.conf" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.authd" sharing output destination "/var/log/asl" with ASL Module "com.apple.asl".
	Output parameters from ASL Module "com.apple.asl" override any specified in ASL Module "com.apple.authd".
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.authd" sharing output destination "/var/log/system.log" with ASL Module "com.apple.asl".
	Output parameters from ASL Module "com.apple.asl" override any specified in ASL Module "com.apple.authd".
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.authd" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.eventmonitor" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.mail" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.performance" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.iokit.power" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.contacts.ContactsAutocomplete" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.mkb" sharing output destination "/private/var/log/keybagd.log" with ASL Module "com.apple.mkb.internal".
	Output parameters from ASL Module "com.apple.mkb.internal" override any specified in ASL Module "com.apple.mkb".
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.mkb" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.AddressBookLegacy" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.MessageTracer" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:03 localhost syslogd[120]: Configuration Notice:
	ASL Module "com.apple.clouddocs" claims selected messages.
	Those messages may not appear in standard system log files or in the ASL database.
Jan  2 11:56:01 localhost com.apple.xpc.launchd[1]: rc.server: optional boot task not present
Jan  2 11:56:02 localhost com.apple.xpc.launchd[1]: acct: optional boot task not present
Jan  2 11:56:02 localhost com.apple.xpc.launchd[1]: Early boot complete. Continuing system boot.