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Commit d3573e4a authored by Simon Peyton Jones's avatar Simon Peyton Jones Committed by Ben Gamari
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Look inside implications in simplifyRule 

Trac #14732 was a perpelexing bug in which -fdefer-typed-holes
caused a mysterious type error in a RULE.  This turned out to
be because we are more aggressive about creating implications
when deferring (see TcUnify.implicationNeeded), and the rule
mechanism hadn't caught up.

This fixes it.

(cherry picked from commit e9ae0cae)
parent 77cdf60c
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