The 'MEASUREMENT_EXPIRED' reason in CIRC events and 'GETINFO circuit-status' is undocumented... https://gitweb.torproject.org/torspec.git/blob/HEAD:/control-spec.txt#l1276 ``` atagar@morrigan:~/Desktop/tor/torspec$ grep -R "MEASUREMENT_EXPIRED" ./* ./control-spec.txt: "MEASUREMENT_EXPIRED" ``` This reason was added by Mike in 73f53343 so assigning to him... https://gitweb.torproject.org/torspec.git/commitdiff/73f53343