#10330: Better Template Haskell error message locations -------------------------------------+------------------------------------- Reporter: simonpj | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Template Haskell | Version: 7.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by goldfire): In my opinion, (2) above is more important than (1). The `singletons` package encourages wrapping up lots of code in one big splice and quote. (`$(singletons [d| data Foo = ... ; bar :: ...; bar = ...; ... |])`) Because of the bug reported here, users get no location information attached to often-baroque errors. Agreed that (2) is quite a bit harder to fix than (1), though. (2) would seem to require a full overhaul of the TH AST and would break many clients of TH. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10330#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler