[Buildbot-devel] perforce authentication not working

[Henry]

I am trying to use buildbot with a project that uses perforce for  
version control, and it is failing at polling it for changes.  
Specifically, it rejects the password as incorrect or missing. I can't  
tell quite what is going on. If, at the command line, I put the  
password into P4PASSWD or using it at the 'p4 login' prompt, it works.  
But, if I put it after -P, it does not work.

buildbot never works, where I 'p4 login' or 'export' the P4PASSWD  
variable or pass P4Source p4passwd='thepassword'.

Any ideas on why this is happening, or how I can debug it further?

P4 poll failed: [Failure instance: Traceback (failure with no frames):  
<type 'exceptions.IOError'>: got stderr: 'Perforce password (P4PASSWD)  
invalid or unset.\n']