dbus @1.12.20_0: dscl eDSRecordAlreadyExists error on install

[mbluemer (Mark Bluemer)]

Was trying to install dbus and I ran into the dscl error eDSRecordAlreadyExists:

❯ sudo port install dbus                                                                                                                                                                                                                             16:47:18
Password:
--->  Computing dependencies for dbus
--->  Installing dbus @1.12.20_0
<main> attribute status: eDSRecordAlreadyExists
<dscl_cmd> DS Error: -14135 (eDSRecordAlreadyExists)
Error: dscl(64002) terminated with an exit status of 55
Error: Failed to install dbus: dscl failed to create required user _messagebus.
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_dbus/dbus/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.
Error: Processing of port dbus failed

Running dscl . -read /Users/_messagebus returns eDSRecordNotFound so the user record definitely wasn't created. This was also happening to me with the port postgresql10-server and the _postgres user.

I've attached the main.log file for review.

[jmroot (Joshua Root)]

That is quite strange. What is printed if you run this?

echo "package require Pextlib; puts [existsuser _messagebus]" | port-tclsh

[mbluemer (Mark Bluemer)]

Running the command gives me:

❯ echo "package require Pextlib; puts [existsuser _messagebus]" | port-tclsh                                          20:10:28
-1