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Commit bdc99cc2 authored by Simon Peyton Jones's avatar Simon Peyton Jones Committed by Marge Bot
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Check for uninferrable variables in tcInferPatSynDecl 

This fixes #21479

See Note [Unquantified tyvars in a pattern synonym]

While doing this, I found that some error messages pointed at the
pattern synonym /name/, rather than the /declaration/ so I widened the
SrcSpan to encompass the declaration.
parent 35da81f8
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