#8848: Warning: Rule too complicated to desugar -------------------------------------+------------------------------------- Reporter: carter | Owner: Type: bug | Status: closed Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 7.8.1-rc2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | simplCore/should_compile/T8848, | T8848a | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj): I don't think that comment:12 has much to do with this ticket although it's hard to tell without a repro case. It's easy to make GHC diverge using rules. Most crudely {{{ {-# RULE map2 = map2 #-} }}} would do it, by making the rule fire repeatedly. Your code looks sort of like that, although as I say it is hard to tell. You can see more of what is happening with `-ddump-inlinings` and `-ddump- rule-firings`. For now I think this probably a user error. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8848#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler