"When I skip too fast, it crashes"

[oldlaptop]

[08:23:33] <abacus> oldlaptop: hey, I met a bug in mprand :o
[08:24:21] <abacus> when I skip too fast, it crashes: https://www.toptal.com/developers/hastebin/raw/moheregabe

Contents of the pastebin:

mprand: details: key "song" not known in dictionary
    while executing
"dict get $status song"
    (lambda term " {} {

log "starting..." 1

if {[info exists ::env(MPD_HOST)..." line 39)
    invoked from within
"apply { {} {

log "starting..." 1

if {[info exists ::env(MPD_HOST)]} {
        set host $::env(MPD_HOST)
} else {
        set host localhost
}

if {[info exists ::..."
    invoked from within
"::main"

[oldlaptop]

This is, more precisely, caused by another client stopping playback while on or after the last song, which is only possible by racing mprand (and winning). tkmprand is confused as well, though not in precisely the same way.