travis-ci/travis-ci.github.com — comment on commit c71a9a153d6809af5dca7a1ad23f8077f4a7be1b
File: docs/user/build-configuration/index.html line 155
By svenfuchs:

Is this true? I believe it will be 4 builds.

1.9.2 / FOO=foo BAR=bar
rbx / FOO=foo BAR=bar

1.9.2 / FOO=bar BAR=foo
rbx / FOO=bar BAR=foo

There doesnt seem to be a test for this particular case: https://github.com/travis-ci/travis-ci/blob/master/spec/models/build/matrix_spec.rb