Title: Non-zero wait status: 139 with libtap
Date: 2014-07-17 15:30

I was writing some unit-tests for [libotr]( http://otr.im ) with
[libtap]( https://github.com/zorgnax/libtap ) (a pretty cool and simple C unit-test library),
when I stumbled upon this:

```bash
test_dh (Wstat: 139 Tests: 5 Failed: 0)
  Non-zero wait status: 139
  Parse errors: Bad plan.  You planned 7 tests but ran 5.
```

I checked that I wrote seven tests and not five, that my build system was correct,
that nothing was wrong in the code, and found nothing obvious.

The explanation is that 139 % 128 = 11, which is a *SIGSEGV*: my code was segfaulting.
This is why it couldn't run seven tests: the fifth one killed the program.
Everything turned to green after a proper fix of a unallocated variable.