#15038: Memory Corruption (strange closure type) -------------------------------------+------------------------------------- Reporter: andrewthad | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by osa1): I managed to reproduce this without stack or cabal. Steps: - Install dependencies: `cabal install containers split ghc-prim primitive` - Build the executable: `ghc-stage2 common/Data/Trie/Naive.hs src/Packed/Bytes.hs src/Packed/Bytes/Parser.hs src/Packed/Bytes/Small.hs src/Packed/Bytes/Stream/ST.hs src/Packed/Bytes/Window.hs test/Main.hs test/Parser.hs -fforce-recomp -o main` - Run `./main` It works fine with `-O0`, fails with `-O1` and `-O2`, but with different "strange closure" types. `-O1` prints 16661, `-O2` prints 16665. Even more interestingly I get a different number if I also add `-debug`: 16621. The object with "strange closure type" is a static one, and does not reside in heap. On my system it's at 0x967900. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15038#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler