#8646: Distinguish between update frames in rts/Printer.c -------------------------------------+------------------------------------ Reporter: Tarrasch | Owner: simonmar Type: feature request | Status: patch Priority: lowest | Milestone: _|_ Component: Runtime System | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by ezyang): Your function has an invariant, "must be an UPDATE_FRAME". So logically, it should check if that invariant is violated. I think your check in (1) is the right one but I haven't double-checked. If an invariant is violated, barfing seems to be the right thing to do. Honestly, I would also barf when you expected an update frame but didn't get one. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8646#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler