Hi Kostya,
custom-crossover test was failing for a while on an os x bot,
do you think you could take a look?
The failure is at http://green.lab.llvm.org/green/job/libFuzzer/8168/console.
Let me know if I can help narrowing it down.
George
On linux the test is pretty stable.
I still don’t have a Mac 
May I ask you to run it manually and send the output?
./CustomCrossOverTest -seed=1 -runs=100000
What if you just change -runs=100000 to -runs=1000000? (one more zero)
Actually I can’t reproduce it either, and the bot mysteriously went back to green, so…
I’ve bumped the iteration count (there was another mail thread 