Skip to content

GitLab

  • Menu
Projects Groups Snippets
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
  • Sign in / Register
  • GHC GHC
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
    • Locked Files
  • Issues 4,866
    • Issues 4,866
    • List
    • Boards
    • Service Desk
    • Milestones
    • Iterations
  • Merge requests 461
    • Merge requests 461
  • CI/CD
    • CI/CD
    • Pipelines
    • Jobs
    • Schedules
    • Test Cases
  • Deployments
    • Deployments
    • Releases
  • Analytics
    • Analytics
    • Value stream
    • CI/CD
    • Code review
    • Insights
    • Issue
    • Repository
  • Wiki
    • Wiki
  • Snippets
    • Snippets
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #4174
Closed
Open
Created Jul 06, 2010 by lilac@trac-lilac

Jumbled error message from type family operator

The attached file produces this error message:

Testcase.hs:82:0:
    Couldn't match expected type `True'
           against inferred type `Main.R::<=:GHC6'10GHC6'8 Minor1 minor'
    When generalising the type(s) for `testcase'

That should say

[...] against inferred type `GHC6'10 Minor1 :<=: GHC6'8 minor'

Apologies for the complexity of the testcase; simpler testcases seem to not reproduce the problem.

Trac metadata
Trac field Value
Version 6.12.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler (Type checker)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information
Assignee
Assign to
Time tracking