kazu-yamamoto/ghc-mod — pull request #411 by markus1189 (2014-12-01 11:20:29+00:00)
Title: Don't mark "Could not deduce" messages as warnings

IMO type errors should not be flagged as warnings. Currently ghc-mod flags anything starting with `Warning: ` as a warning and highlights them accordingly.

This patch adds a simple check for `Could not deduce` and flags these as errors.

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Best,
Markus