[llvm-testresults] buildbot failure in lab.llvm.org on libcxx_clang-x86_64-darwin11-RA

[llvmlab-buildmaster at lab.llvm.org]

The Buildbot has detected a failed build on builder libcxx_clang-x86_64-darwin11-RA while building lab.llvm.org.
Full details are available at:
 http://lab.llvm.org:8013/builders/libcxx_clang-x86_64-darwin11-RA/builds/255

Buildbot URL: http://lab.llvm.org:8013/

Buildslave for this Build: xserve4

Build Reason: The web-page 'rebuild' button was pressed by '<unknown>': 

Build Source Stamp: 188191
Blamelist: 

BUILD FAILED: failed venv.lit.install

sincerely,
 -The Buildbot


================================================================================

CHANGES:


LOGS:
Last 15 lines of 'stdio':
	Upon execvpe lit.venv/bin/python ['lit.venv/bin/python', 'setup.py', 'install'] in environment id 140291391783696
	:Traceback (most recent call last):
	  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twisted/internet/process.py", line 414, in _fork
	    executable, args, environment)
	  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/twisted/internet/process.py", line 460, in _execChild
	    os.execvpe(executable, args, environment)
	  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 353, in execvpe
	    _execvpe(file, args, env)
	  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 368, in _execvpe
	    func(file, *argrest)
	OSError: [Errno 2] No such file or directory