t.i.u._UnexpectedErrorOutput(IOError) : class documentation

Standard error data was received where it was not expected. This is a subclass of IOError to preserve backward compatibility with the previous error behavior of getProcessOutput.

Instance Variable	processEnded	A Deferred which will fire when the process which produced the data on stderr has ended (exited and all file descriptors closed).
Method	__init__	Undocumented