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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #9609

GHCi gives overly specific error message for unknown constructor

What happens:

Prelude> :i Fish

Top level: Not in scope: data constructor ‘Fish’

This is potentially confusing because :i can be used for type constructors and classes, as well as data constructors. What I think should happen:

Prelude> :i Fish

Top level: Not in scope: constructor or class ‘Fish’
Trac metadata
Trac field Value
Version 7.8.2
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
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