#7411: Exceptions are optimized away in certain situations -------------------------------------+------------------------------------- Reporter: SimonHengel | Owner: tdammers Type: bug | Status: new Priority: high | Milestone: 8.6.1 Component: Compiler | Version: 7.6.1 Resolution: | Keywords: seq, deepseq, | evaluate, exceptions Operating System: Linux | Architecture: x86_64 | (amd64) Type of failure: Incorrect result | Test Case: at runtime | simplCore/should_fail/T7411 Blocked By: | Blocking: Related Tickets: #5129 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): A program that might run slower without the state hack is {{{ f :: Char -> IO () f 'x' = return () f c = putChar c }}} Now call that `f` many times. Without the state hack I think it'll have arity 1, returning a lambda that does the I/O. We must find out what happens with fasta, yes, but what are the perf results from nofib? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7411#comment:37 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler