[marc_omorain]

It seems odd to see a commit in this day and age with no unit test. When you make a new newkey struct the clean-up callback should be NULL.

[noselasd]

That's the fun with C, it would be quite unlikely the malloc call in a unit test for this didn't happen to zero initialize the struct.

[meowface]

Yep. You may get different results based on the code path taken, the compiler, and (maybe?) the OS. Most of the time the value at that memory location will probably be a zero byte (or a zero word/dword), but sometimes it may not.

[djmdjm]

We committed a regression test fix separately.