Use unsigned version format. This way can use one additional bit, and when encountering invalid revlogs with the first bit set don't produce python warnings or strange error messages.

     1

#!/bin/sh

     2

     3

hg init

     4

python -c 'print "confuse str.splitlines\nembedded\rnewline"' > a

     5

hg ci -Ama -d '1 0'

     6

echo clean diff >> a

     7

hg ci -mb -d '2 0'

     8

hg diff -r0 -r1