Commit e9d3e28a authored by Simon Peyton Jones's avatar Simon Peyton Jones

Comments only

parent ed57ea49
......@@ -601,6 +601,9 @@ goals. But to be honest I'm not absolutely certain, so I am leaving
FM_Avoid in the code base. What I'm removing is the unique place
where it is *used*, namely in TcCanonical.canEqTyVar.
See also Note [Conservative unification check] in TcUnify, which gives
other examples where lazy flattening caused problems.
Bottom line: FM_Avoid is unused for now (Nov 14).
Note: T5321Fun got faster when I disabled FM_Avoid
T5837 did too, but it's pathalogical anyway
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