#13360: Add a flag to enable inferring HasCallStack constraints -------------------------------------+------------------------------------- Reporter: gridaphobe | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 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 gridaphobe): I think I would want GHC to inject `HasCallStack` into explicit type signatures. One possibility would be to just always add `HasCallStack` as a top-level given, and then silently drop it if it's found to be unused. I know GHC already has code to warn about unused constraints, but I don't know how awkward it would be to make use of that for this purpose. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13360#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler