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The patch breaks test_binhex on 32 and 64 bit architectures 
because Lib/binhex.py is using struct.pack('>h' ...) to pack 
an unsigned short (which is  wrong but does work with the 
current version of Modules/structmodule.c because of the 
lack of range checking).  
 
The patch breaks test_gzip (and test_tarfile) on 64 bit 
architectures because Lib/gzip.py is using write32 (which 
uses to pack('<l',...) ) to write an unsigned 32 bit checksum.  
 
This should be fixed in Lib/gzip.py and Lib/binhex.py.