fromPromise failure tests

[scull7]

I was attempting to re-create an error I was seeing in an upstream module. Seems that all is well here.

[coveralls]

Pull Request Test Coverage Report for Build 17

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+6.3%) to 97.938%

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Totals
Change from base Build 15:	6.3%
Covered Lines:	82
Relevant Lines:	83

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💛 - Coveralls

[gilbert]

Nice, thanks for the extra assurance.