Anyone have a theory on the types of things that would cause this failure?
It has happened each time I run the test suite:

send.test

==== send-12.3 TimeoutProc procedure
==== Contents of test case:

    winfo interps
    tk appname tktest
    update
    setupbg
    puts $fd {after 10 {after 5000; exit}; puts [tk appname]; puts **DONE**; flu
sh stdout}
    set bgDone 0
    set bgData {}
    flush $fd
    tkwait variable bgDone
    set app $bgData
    after 200
    set result [list [catch {send $app foo} msg] $msg]
    close $fd
    set result

==== Result was:
1 {invalid command name "foo"}
---- Result should have been:
1 {target application died}
---- send-12.3 FAILED

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