In the most recent checkout on Linux, test_largefile.py fails. The output is:
[guido@pcp742651pcs linux]$ ./python ../Lib/test/test_largefile.py create large file via seek (may be sparse file) ... check file size with os.fstat 2500000001L =?= 2500000001L ... yes check file size with os.stat 2500000001L =?= 2500000001L ... yes play around with seek() and read() with the built largefile 0L =?= 0 ... yes 'z' =?= 'z' ... yes 1L =?= 1 ... yes 0L =?= 0 ... yes 0L =?= 0 ... yes 42L =?= 42 ... yes 42L =?= 42 ... yes 84L =?= 84 ... yes 84L =?= 84 ... yes 2500000001L =?= 2500000001L ... yes 2499999991L =?= 2499999991L ... yes 0L =?= 0 ... yes 2500000000L =?= 2500000000L ... yes 'a' =?= 'a' ... yes 'z' =?= 'z' ... yes 1L =?= 1 ... yes play around with os.lseek() with the built largefile 0L =?= 0 ... yes 42L =?= 42 ... yes 84L =?= 84 ... yes 84L =?= 84 ... yes 2500000001L =?= 2500000001L ... yes 2499999991L =?= 2499999991L ... yes 0L =?= 0 ... yes 2500000000L =?= 2500000000L ... yes 'a' =?= 'a' ... yes try truncate 2500000001L =?= 2500000001L ... yes 2499999990L =?= 2499999990L ... yes 2499999990L =?= 2499999990L ... yes 0L =?= 2499999989L ... no Traceback (most recent call last): File "../Lib/test/test_largefile.py", line 149, in ? expect(f.tell(), newsize) File "../Lib/test/test_largefile.py", line 59, in expect raise test_support.TestFailed, 'got %r, but expected %r' %\ test_support.TestFailed: got 0L, but expected 2499999989L [guido@pcp742651pcs linux]$
--Guido van Rossum (home page: http://www.python.org/~guido/)