[cfe-dev] Heisenbug when launching tests

[Gautier DI FOLCO]

Hello all,

I have a random bug when I launch check-all:

   lit.py: discovery.py:224: warning: input
   '/home/black/llvm/build/projects/compiler-rt/test/asan/Unit' contained no
   tests
   lit.py: discovery.py:224: warning: input
   '/home/black/llvm/build/projects/compiler-rt/test/sanitizer_common'
   contained no tests
   lit.py: discovery.py:190: warning: test suite 'ThreadSanitizer-Unit'
   contained no tests
   lit.py: lit.cfg:196: note: using clang:
   '/home/black/llvm/build/./bin/clang'
   lit.py: TestingConfig.py:108: fatal: unable to parse config file
   '/home/black/llvm/src/tools/clang/test/lit.cfg', traceback: Traceback (most
   recent call last):
     File "/usr/home/black/llvm/src/utils/lit/lit/TestingConfig.py", line
   95, in load_from_path
       exec(compile(data, path, 'exec'), cfg_globals, None)
     File "/home/black/llvm/src/tools/clang/test/lit.cfg", line 258, in
   <module>
       getClangBuiltinIncludeDir(config.clang))) )
     File "/home/black/llvm/src/tools/clang/test/lit.cfg", line 221, in
   getClangBuiltinIncludeDir
       stdout=subprocess.PIPE)
     File "/usr/local/lib/python2.7/subprocess.py", line 709, in __init__
       errread, errwrite)
     File "/usr/local/lib/python2.7/subprocess.py", line 1326, in
   _execute_child
       raise child_exception
   OSError: [Errno 13] Permission denied


It occurs sometimes, "randomly", even if I don't touch any file.
Do you know what is the root of this problem? How can I solve it
definitively?

Thanks by advance for your help.
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