#9666: runtime crashing with +RTS -w -h -------------------------------------+------------------------------------- Reporter: lspitzner | Owner: simonmar Type: bug | Status: new Priority: low | Milestone: Component: Runtime System | Version: 7.8.3 Keywords: | Operating System: Linux Architecture: x86_64 (amd64) | Type of failure: Runtime Difficulty: Unknown | crash Blocked By: | Test Case: (see Related Tickets: | description) | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- A combination of the RTS flags -w and -h makes executables generated with ghc crash at runtime. Does not happen always; my current guess is that a gc run triggers the bug. Reproducible with the following input: '''Main.hs''' {{{#!hs module Main where import qualified Data.Map.Strict as M main = print $ M.lookup 10 $ M.fromList [ (i,i) | i<-[1..10000000] ] }}} {{{

ghc -rtsopts Main.hs && ./Main +RTS -w -h [1 of 1] Compiling Main ( Main.hs, Main.o ) Linking Main ... Main: internal error: heapCensus, unknown object: 4093 (GHC version 7.8.3 for x86_64_unknown_linux) }}}

optimization level did not change the outcome. I am aware that -w is marked experimental, and I don't need it. Just noticed the crashing. @simon: you get added to Cc (one more time) every time I press "preview", it seems. Doubt that is intentional.. I'll leave you in Cc just so you get this message. (hmm.. where is the bug-tracker bug-tracker..) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9666 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler