#15559: fromJust has no HasCallStack -------------------------------------+------------------------------------- Reporter: nomeata | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: 8.6.1 Component: Core Libraries | Version: 8.4.3 Resolution: | Keywords: newcomer 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 chessai):
I really like GHC's internal HasDebugCallStack, which disappears (that is, becomes ()) when DEBUG is not defined via CPP and becomes HasCallStack when DEBUG is defined. As far as I know, there's no standard way to mark a build meant for debugging, but perhaps there should be. Then, we could do the same for all applications instead of just GHC.
In addition to making this available to users of GHC, there should probably be an additional side-effect to the DEBUG flag, or a separate flag, that turns HasDebugCallStack on for all functions -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15559#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler