• Simon Peyton Jones's avatar
    Do not discard insoluble constraints in simplifyInfer · c1f01e35
    Simon Peyton Jones authored
    Before -fdefer-type-errors there we no insolubles
    (because we'd have failed before then), but with -fdefer-type-errors
    there can be.  The code is acutally a bit simpler: we just call
    emitConstraints, and eliminate the bogus-looking emitWC from TcRnMonad.
    
    There's a bit more tidying up to do, concerning the places we use
    keepWanted, but I need to talk to Dimitrios about that.
    
    Meanwhile this fixes Trac #7023
    c1f01e35