#11787: Infer HasCallStack where possible -------------------------------------+------------------------------------- Reporter: simonpj | Owner: gridaphobe Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: invalid | 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: | -------------------------------------+------------------------------------- Changes (by simonpj): * status: new => closed * resolution: => invalid Comment:
we no longer infer CallStacks, period
Oh yes, right! That makes this ticket redundant.
You seem to be suggesting that the fix for #11376 involves expanding type synonyms,
Typechecking any expression, such as `(\x -> error x)` involves instantiating constraints, in this case the `HasCallStack` constraint from `error`. Then we simplify and re-generalise. It's that step that expands the synonym. Anyway, I'll close this as no-longer-relevant. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11787#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler