As a short term fix how bad would it be to make `-fdefer-type-errors` incompatible with GHCi?
We could apply that fix to HEAD (until we fix this ticket properly) and
#14963: ghci -fdefer-type-errors can't run IO action from another module -------------------------------------+------------------------------------- Reporter: elaforge | Owner: tdammers Type: bug | Status: new Priority: high | Milestone: 8.4.2 Component: GHCi | Version: 8.4.1 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 tdammers): Replying to [comment:16 simonpj]: perhaps even to 8.4.3. I wouldn't be surprised to find that this breaks someone's workflow. Maybe we could get some opinions on this from the community? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14963#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler