Fix segfaults when parsing bdiff hunks in mpatch.decode() and .patchedsize() - fix off by 11 when checking if there are more hunks (found by Maris Fogels) - bail out if start is greater than end - check if new hunk starts after start/end/len block of current hunk as the pointer can wrap around on very large values, reproducible with import mpatch; mpatch.patchedsize(12, 'x'*12)

Is there an error message when trying to diff non-existing files?
found: No such file or directory
not: No such file or directory
Is there an error message when trying to add non-existing files?
found: No such file or directory
not: No such file or directory