Fatal error thrown by Eternal after restart: "TypeError: Cannot set property 'pid' of undefined"

eternal error setting pid

Occupy the Lulz started on port 8080
[2015-03-06T10:38:36.839Z] Application restarted with pid 2028439

/opt/modulus/eternal/lib/eternal/plugins/watch.js:154
    procmon.pid = [pid];d
                ^
TypeError: Cannot set property 'pid' of undefined
    at Object.internals.restart (/opt/modulus/eternal/lib/eternal/plugins/watch.js:154:17)
    at /opt/modulus/eternal/lib/eternal/plugins.js:72:54
    at Array.forEach (native)
    at Object.plugins.restart (/opt/modulus/eternal/lib/eternal/plugins.js:71:20)
    at /opt/modulus/eternal/bin/run:87:15
    at /opt/modulus/eternal/bin/run:118:7
    at ChildProcess.exithandler (child_process.js:645:7)
    at ChildProcess.emit (events.js:98:17)
    at maybeClose (child_process.js:755:16)
    at Process.ChildProcess._handle.onexit (child_process.js:822:5)