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Issue #28485: Check for negative workers even without ProcessPoolExecutor

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This matches the documentation, and passes the test suite when multithreading
is disabled.
This commit is contained in:
Martin Panter 2016-11-05 01:11:36 +00:00
parent da4887a88d
commit 88281ceed0
2 changed files with 7 additions and 3 deletions
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6
Lib/compileall.py
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@ -66,13 +66,13 @@ def compile_dir(dir, maxlevels=10, ddir=None, force=False, rx=None,
optimize: optimization level or -1 for level of the interpreter
workers: maximum number of parallel workers
"""
if workers is not None and workers < 0:
raise ValueError('workers must be greater or equal to 0')
files = _walk_dir(dir, quiet=quiet, maxlevels=maxlevels,
ddir=ddir)
success = 1
if workers is not None and workers != 1 and ProcessPoolExecutor is not None:
if workers < 0:
raise ValueError('workers must be greater or equal to 0')
workers = workers or None
with ProcessPoolExecutor(max_workers=workers) as executor:
results = executor.map(partial(compile_file,