running tests for: hamming
File "test.ml", line 34, characters 6-66:
Error: This variant expression is expected to have type int option
The constructor :: does not belong to type option
make[2]: *** [Makefile:4: test] Error 1
make[1]: *** [Makefile:27: test-assignment] Error 2
make: *** [Makefile:35: test] Error 1
The command "docker run -w /repo -v $(pwd):/repo -it ci .travis/.travis-ci.sh" exited with 2.
There was a CI failure: