#15007: Don't keep shadowed variables in ghci, both renamer and type checker -------------------------------------+------------------------------------- Reporter: sighingnow | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: GHCi | Version: 8.5 Resolution: | Keywords: TypedHoles Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: #11547 #14052 | Differential Rev(s): Phab:D4909 #15202 | Wiki Page: | -------------------------------------+------------------------------------- Comment (by osa1): sighingnow, are you sure you rebuilt it correctly? I'm also using a debug- enabled compiler and here are the outputs I'm getting: {{{ ~ $ ghc-stage2 --interactive GHCi, version 8.7.20180704: http://www.haskell.org/ghc/ :? for help Prelude> 1 1 Prelude> 1 1 Prelude> _ <interactive>:3:1: error: • Found hole: _ :: t Where: ‘t’ is a rigid type variable bound by the inferred type of it :: t at <interactive>:3:1 • In the expression: _ In an equation for ‘it’: it = _ • Relevant bindings include it :: t (bound at <interactive>:3:1) Prelude> }}} {{{ ~ $ ghc-stage2 --interactive GHCi, version 8.7.20180704: http://www.haskell.org/ghc/ :? for help Prelude> let x = () Prelude> let x = () Prelude> :t _ <interactive>:1:1: error: • Found hole: _ :: t Where: ‘t’ is a rigid type variable bound by the inferred type of it :: t at <interactive>:1:1 • In the expression: _ Prelude> }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15007#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler