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Importlib was not matching import's handling of .pyc files where it had less

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then 8 bytes total in the file.

Fixes issues 7361 & 7875.
This commit is contained in:
Brett Cannon 2010-02-19 16:01:06 +00:00
parent 055470a227
commit 9b3e15fbc4
2 changed files with 109 additions and 29 deletions
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15
Lib/importlib/_bootstrap.py
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@ -396,19 +396,24 @@ class PyPycLoader(PyLoader):
bytecode_path = self.bytecode_path(fullname)
if bytecode_path:
data = self.get_data(bytecode_path)
magic = data[:4]
pyc_timestamp = marshal._r_long(data[4:8])
bytecode = data[8:]
try:
magic = data[:4]
if len(magic) < 4:
raise ImportError("bad magic number in {}".format(fullname))
raw_timestamp = data[4:8]
if len(raw_timestamp) < 4:
raise EOFError("bad timestamp in {}".format(fullname))
pyc_timestamp = marshal._r_long(raw_timestamp)
bytecode = data[8:]
# Verify that the magic number is valid.
if imp.get_magic() != magic:
raise ImportError("bad magic number")
raise ImportError("bad magic number in {}".format(fullname))
# Verify that the bytecode is not stale (only matters when
# there is source to fall back on.
if source_timestamp:
if pyc_timestamp < source_timestamp:
raise ImportError("bytecode is stale")
except ImportError:
except (ImportError, EOFError):
# If source is available give it a shot.
if source_timestamp is not None:
pass