id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	blockedby	blocking	branch_state	votes
350	mc compare directories (thorough) thinks empty files are different	snizovtsev	slavazanko	"https://bugs.launchpad.net/ubuntu/+source/mc/+bug/181034
The bug was caused by mmap behaviour when length = 0. Here is quote from man(3) mmap:
       SUSv3  specifies that mmap() should fail if length is 0.  However, in kernels before 2.6.12, mmap() succeeded in this case: no mapping was created
       and the call returned addr.  Since kernel 2.6.12, mmap() fails with the error EINVAL for this case.
"	defect	closed	trivial	4.7	mc-core	4.6.2	fixed	commited-master