Tortuga died with "cull_wedged_cpuworkers" in log

[Tortuga admin]

Ciao a tutti,

today tortuga died with this message in the log:

Feb 01 12:51:06.784 [notice] cull_wedged_cpuworkers(): Bug: closing wedged 
cpuworker. Can somebody find the bug?

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Ciao
tortuga tor router admin