987062 - Stack trace appearing in servo buildbot logs: object of type '_Renderer' has no len()

Status: RESOLVED WONTFIX

(Release Engineering :: General, defect)

Description

[Pete Moore [:pmoore][:pete]]

Just came across this while investigating another issue.


Getting this from time-to-time in servo logs (in this case it was buildbot-master-servo-01.srv.servo.releng.use1.mozilla.com:/builds/buildbot/servo1/master/twistd.log):


2014-03-23 08:51:21-0700 [-]  step 'update-mozharness' complete: success
2014-03-23 08:51:21-0700 [-] Error describing step
        Traceback (most recent call last):
          File "/builds/buildbot/servo1/lib/python2.7/site-packages/buildbot/process/build.py", line 393, in startNextStep
            d = defer.maybeDeferred(s.startStep, self.remote)
          File "/builds/buildbot/servo1/lib/python2.7/site-packages/twisted/internet/defer.py", line 133, in maybeDeferred
            result = f(*args, **kw)
          File "/builds/buildbot/servo1/lib/python2.7/site-packages/buildbot/process/buildstep.py", line 537, in startStep
            self.step_status.setText(self.describe(False))
          File "/builds/buildbot/servo1/lib/python2.7/site-packages/buildbot/steps/shell.py", line 157, in describe
            desc = self._describe(done)
        --- <exception caught here> ---
          File "/builds/buildbot/servo1/lib/python2.7/site-packages/buildbot/steps/shell.py", line 196, in _describe
            len(words)
        exceptions.TypeError: object of type '_Renderer' has no len()

2014-03-23 08:51:21-0700 [-] ShellCommand.startCommand(cmd=<RemoteShellCommand '['python', 'mozharness/scripts/servo_build.py', '--repo', 'https://github.com/mozilla/servo.git', '--revision', u'e67d8a4003738a95d769ee562b3d45de1be279c2',
 '--branch', u'auto', '--config-file', u'https://raw.github.com/mozilla/servo/e67d8a4003738a95d769ee562b3d45de1be279c2/bld/linux.py']'>)

Seems to occur in several places, not just a one-off.

Comment 1

[[e-mail] (:bhearsum)]

The job that generated this didn't have any issues and its log seems fine, so at least this isn't breaking anything.

http://buildbot-master-servo-01.srv.servo.releng.use1.mozilla.com:8001/builders/linux/builds/1133

Comment 2

[Rail Aliiev [:rail]]

Will be retired in bug 1071178