ports bug?

[Marko Käning]

I just upgraded my tree. cmake was one of the ports to be upgraded. This is what I saw on the console:

--->  Cleaning cmake
can't read "parentworker": no such variable
    while executing
"_mportispresent $parentworker $dspec "
    (procedure "macports::_upgrade" line 42)
    invoked from within
"macports::_upgrade $portname $dspec $variationslist $optionslist depscache"
    (procedure "macports::upgrade" line 20)
    invoked from within
"macports::upgrade $portname "port:$portname" [array get requested_variations] [array get options] depscache"
    ("uplevel" body line 3)
    invoked from within
"uplevel 1 $block"
    (procedure "foreachport" line 20)
    invoked from within
"foreachport $portlist {
        if {![info exists depscache(port:$portname)]} {
            set status [macports::upgrade $portname "port:$portname" [..."
    (procedure "action_upgrade" line 8)
    invoked from within
"$action_proc $action $portlist [array get global_options]"
    (procedure "process_cmd" line 95)
    invoked from within
"process_cmd $remaining_args"
    invoked from within
"if { [llength $remaining_args] > 0 } {

    # If there are remaining arguments, process those as a command
    set exit_status [process_cmd $remaining..."
    (file "/opt/macports-test/bin/port" line 4664)
--->  Uninstalling cmake @2.8.4_0

What's going on here?
Shall I file a ticket on "port"?