#13043: GHC 7.10->8.0 regression: GHC code-generates duplicate _closures -------------------------------------+------------------------------------- Reporter: hvr | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.0.2 Component: Compiler | Version: 8.0.2-rc2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | crash or panic Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Giving GHC 8.0.2rc2 a closer look I stumbled over this one: This works fine in GHC 7.10.3, but fails to compile with GHC 8.0.2rc2: {{{ Resolving dependencies... In order, the following will be built (use -v for more details): - vivid-0.1.0.3 {vivid-0.1.0.3-inplace} (lib) (first run) Configuring component lib from vivid-0.1.0.3... Preprocessing library vivid-0.1.0.3... [ 1 of 10] Compiling Vivid.SynthDef.Types ( Vivid/SynthDef/Types.hs, /tmp/vivid-0.1.0.3/dist- newstyle/build/x86_64-linux/ghc-8.0.1.20161213/vivid-0.1.0.3/build/Vivid/SynthDef/Types.o ) [ 2 of 10] Compiling Vivid.SynthDef.CrazyTypes ( Vivid/SynthDef/CrazyTypes.hs, /tmp/vivid-0.1.0.3/dist- newstyle/build/x86_64-linux/ghc-8.0.1.20161213/vivid-0.1.0.3/build/Vivid/SynthDef/CrazyTypes.o ) [ 3 of 10] Compiling Vivid.OSC.Util ( Vivid/OSC/Util.hs, /tmp/vivid-0.1.0.3/dist- newstyle/build/x86_64-linux/ghc-8.0.1.20161213/vivid-0.1.0.3/build/Vivid/OSC/Util.o ) [ 4 of 10] Compiling Vivid.SynthDef.Literally ( Vivid/SynthDef/Literally.hs, /tmp/vivid-0.1.0.3/dist- newstyle/build/x86_64-linux/ghc-8.0.1.20161213/vivid-0.1.0.3/build/Vivid/SynthDef/Literally.o ) [ 5 of 10] Compiling Vivid.OSC ( Vivid/OSC.hs, /tmp/vivid-0.1.0.3 /dist- newstyle/build/x86_64-linux/ghc-8.0.1.20161213/vivid-0.1.0.3/build/Vivid/OSC.o ) [ 6 of 10] Compiling Vivid.SCServer ( Vivid/SCServer.hs, /tmp/vivid-0.1.0.3/dist- newstyle/build/x86_64-linux/ghc-8.0.1.20161213/vivid-0.1.0.3/build/Vivid/SCServer.o ) /tmp/ghc12095_0/ghc_27.s: Assembler messages: /tmp/ghc12095_0/ghc_27.s:5860:0: error: Error: symbol `vividzm0zi1zi0zi3zminplace_VividziSCServer_scServerState_closure' is already defined /tmp/ghc12095_0/ghc_27.s:10988:0: error: Error: symbol `vividzm0zi1zi0zi3zminplace_VividziSCServer_scServerState_closure' is already defined /tmp/ghc12095_0/ghc_27.s:11751:0: error: Error: symbol `vividzm0zi1zi0zi3zminplace_VividziSCServer_scServerState_closure' is already defined `gcc' failed in phase `Assembler'. (Exit code: 1) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13043 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler