#9704: GHC fails with "Loading temp shared object failed" -------------------------------------+------------------------------------- Reporter: MaxGabriel | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Keywords: | Operating System: MacOS X Architecture: Unknown/Multiple | Type of failure: Compile- Difficulty: Unknown | time crash Blocked By: | Test Case: Related Tickets: 9074 | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- While developing Yesod project on GHC 7.8.3, `cabal install --force- reinstalls` failed with the following error: {{{ [9 of 9] Compiling Application ( Application.hs, dist/dist-sandbox- e4ea4713/build/Application.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.8.3 for x86_64-apple-darwin): Loading temp shared object failed: dlopen(/var/folders/qk/6s42bj3n6g30fyqf6mc2x_c80000gn/T/ghc13386_0/ghc13386_53.dylib, 9): Symbol not found: _aesonzm0zi8zi0zi1_DataziAesonziTypesziInternal_zdsfromList1_closure Referenced from: /var/folders/qk/6s42bj3n6g30fyqf6mc2x_c80000gn/T/ghc13386_0/ghc13386_53.dylib Expected in: flat namespace in /var/folders/qk/6s42bj3n6g30fyqf6mc2x_c80000gn/T/ghc13386_0/ghc13386_53.dylib Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug cabal: Error: some packages failed to install: MyBlog-0.0.0 failed during the building phase. The exception was: ExitFailure 1 }}} (Full output at https://gist.github.com/MaxGabriel/847561107e4ee2e869f1. Verbose output at https://gist.github.com/MaxGabriel/10c2c3c253815b3f392a) Following compilation, both aeson-0.8.0.1 and aeson-0.8.0.2 are present in the sandbox. Running `cabal install` again yields the same error (full output at https://gist.github.com/MaxGabriel/9aa530105d68a613de11). The code for the project as it was when the panic happened is available here: https://github.com/MaxGabriel/MyBlog-GHC-Panic Is there more information I could provide to diagnose the bug? I'll probably wipe the sandbox and try recompiling in a bit. Version info: OS : OS X 10.10 (14A389) (Yosemite) Cabal: cabal-install version 1.20.0.3 using version 1.20.0.1 of the Cabal library GHC: The Glorious Glasgow Haskell Compilation System, version 7.8.3 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9704 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler