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I can't be certain, but it looks like orphan instance warning have changed in recent versions of GHC. Currently haskell-process-trigger-suggestions
function uses following regex to detect orphan instance warnings in compiler response "Warning: orphan instance: "
[1], while GHC 7.10.3 gives a bit different formatting:
/Users/oman/dev/haskell/sol/solitaire/src/Solitaire.hs:12:10: Warning:
Orphan instance: instance Show Layer
To avoid this
move the instance declaration to the module of the class or of the type, or
wrap the type with a newtype and declare the instance on the new type.
As a result, haskell-process-trigger-suggestions
does not suggest to add OPTIONS pragma as intended.
@gracjan I know we need tests for this function, it's quite big and good test suite should rely on genuine GHC response, what will you say?
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