travis template uses jobs: which overrides any existing matrix:

[jayvdb]

The addition of jobs: in 1650163 breaks any use of matrix: which appeared inside blocks test_other_environments, exclusion_matrix and extra_matrix

e.g. the moban repo https://github.com/moremoban/moban/blob/dev/.moban.d/travis.yml used extra_matrix to check MINREQ=1, but this was silently dropped at moremoban/moban@ac56511 (moremoban/moban#272) because jobs: overrides the matrix:

I am fairly sure that @pyexcel used those blocks also.

[jayvdb]

This isnt easily solved here, as anything could be in extra_matrix.

This can be resolved by fixing any use of extra_matrix after #100 , so that the custom templates use either jobs or extra_jobs if they were using extra_matrix to contain job matrix entries.

And then deprecate extra_matrix or change its docs.