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  • Glasgow Haskell Compiler
  • GHCGHC
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  • #12177

Closed
Open
Opened Jun 10, 2016 by Edward Z. Yang@ezyangDeveloper

Relevant bindings includes shadowed bindings

ezyang@sabre:~$ ghc-8.0 --interactive
GHCi, version 8.0.1: http://www.haskell.org/ghc/  :? for help
Prelude> \x -> \x -> _

<interactive>:1:13: error:
    • Found hole: _ :: t2
      Where: ‘t2’ is a rigid type variable bound by
               the inferred type of it :: t -> t1 -> t2 at <interactive>:1:1
    • In the expression: _
      In the expression: \ x -> _
      In the expression: \ x -> \ x -> _
    • Relevant bindings include
        x :: t1 (bound at <interactive>:1:8)
        x :: t (bound at <interactive>:1:2)
        it :: t -> t1 -> t2 (bound at <interactive>:1:1)

GHC should not report bindings which are shadowed.

Trac metadata
Trac field Value
Version 8.0.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler (Type checker)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
Assignee
Assign to
8.0.2
Milestone
8.0.2 (Past due)
Assign milestone
Time tracking
None
Due date
None
Reference: ghc/ghc#12177