#13526: -Wsimplifiable-class-constraints behaves differently with OVERLAPPING and OVERLAPPABLE -------------------------------------+------------------------------------- Reporter: cocreature | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"65b185d4886b4efa3efe3cc5ecc8dd6e07d89afe/ghc" 65b185d4/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="65b185d4886b4efa3efe3cc5ecc8dd6e07d89afe" Be less aggressive about fragile-context warrnings In the implementation of WarnSimplifiableClassConstraints, be less aggressive about reporting a problem. We were complaining about a "fragile" case that in fact was not fragile. See Note [Simplifiable given constraints] in TcValidity. This fixes Trac #13526. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13526#comment:1> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler