Travis targets not reporting errors

[pp-mo]

For example, the problem that #2981 fixes : docs build fails, but no error is reported.

Within the .travis.yml, various stuff is occurring within command blocks.
-- could be either the use of "if" blocks, or the travis ">" ??

As-is, errors occurring are not aborting subsequent operations, and not propagating upward to report a ❌
(? maybe only last command counts ?)
If this is purely due to block commands, it potentially applies to many different targets.

[djkirkham]

I think this issue has come up before. I believe the solution was to chain commands with &&

Forget what I said, it looks like @QuLogic has identified the error: https://github.com/SciTools/iris/pull/2983/files#r174614911

[pelson]

Will be fixed by #2983

[pp-mo]

Will be fixed by #2983

Agreed, closing