Charles-Francois Natali <[email protected]> added the comment: Could you try with this:
def setUp(self): with open(support.TESTFN, "wb+") as f: f.seek(_4G) f.write(b"asdf") f.flush() + os.fsync(f.fileno()) self.mapping = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) HFS+ doesn't seem to support sparse files, so the file is actually zero-filled asynchronously. Maybe the mapping gets done before the blocks have been allocated, which triggers a segfault when the first page is accessed. I'm not sure it'll make any difference, but I'm curious... Also, I'd be curious to see the result of """ import os name = '/tmp/foo' f = open(name, 'wb') f.seek(1 << 32) f.write(b'asdf') f.flush() print(os.fstat(f.fileno())) f.close() print(os.stat(name)) """ Thanks ! ---------- _______________________________________ Python tracker <[email protected]> <http://bugs.python.org/issue11277> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
