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Add hint on typed-hole error message

    • Closed Issue created by Simon Peyton Jones @simonpj

    If you write

    f flag = _flag + 4

    it's possible that you didn't intend a typed hole; you just mis-typed _flag. So I propose to add hint to the error message saying that

        Found hole ‘_flag’ with type: t
    Where: ...blah blah...
    Or perhaps ‘_flag’ is mis-spelled, or not in scope
    Relevant bindings include it :: t (bound at <interactive>:9:1)

    The third line is the new one.

    See this email trail.

    Trac metadata
    Trac field Value
    Version 7.8.4
    Type Bug
    TypeOfFailure OtherFailure
    Priority normal
    Resolution Unresolved
    Component Compiler
    Test case
    Differential revisions
    BlockedBy
    Related
    Blocking
    CC
    Operating system
    Architecture
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