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only do this sys.stderr replacing on CPython

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This commit is contained in:
Benjamin Peterson 2011-03-06 17:14:30 -06:00
parent 81638f1351
commit d86e4c8673
1 changed files with 7 additions and 4 deletions
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5
Lib/lib2to3/pytree.py
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@ -743,7 +743,9 @@ def generate_matches(self, nodes):
else: else:
# The reason for this is that hitting the recursion limit usually # The reason for this is that hitting the recursion limit usually
# results in some ugly messages about how RuntimeErrors are being # results in some ugly messages about how RuntimeErrors are being
# ignored. # ignored. We only have to do this on CPython, though, because other
# implementations don't have this nasty bug in the first place.
if hasattr(sys, "getrefcount"):
save_stderr = sys.stderr save_stderr = sys.stderr
sys.stderr = StringIO() sys.stderr = StringIO()
try: try:
@ -759,6 +761,7 @@ def generate_matches(self, nodes):
r[self.name] = nodes[:count] r[self.name] = nodes[:count]
yield count, r yield count, r
finally: finally:
if hasattr(sys, "getrefcount"):
sys.stderr = save_stderr sys.stderr = save_stderr
def _iterative_matches(self, nodes): def _iterative_matches(self, nodes):