try assign TRAVIS_JOB_NUMBER to Coveralls' service-job-number
try assign TRAVIS_JOB_NUMBER to Coveralls' service-job-number

redtankd/rust-test,redtankd/github-test,redtankd/rust-test,redtankd/rust-test,redtankd/rust-test,redtankd/rust-test,redtankd/github-test,redtankd/rust-test,redtankd/github-test,redtankd/github-test