#7603: Bad magic in static (FFI) object (7.6.1 for x86_64-apple-darwin) -------------------------------+-------------------------------------------- Reporter: morabbin | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.6.1 | Keywords: Os: MacOS X | Architecture: x86_64 (amd64) Failure: Compile-time crash | Blockedby: Blocking: | Related: -------------------------------+-------------------------------------------- When spraying [http://code.google.com/p/hoc/ HOC] (Haskell to Objective-C) for bitrot, I encountered a GHC panic during the loading of some FFI. Judging by the log below, it looks like this is during a TH execution, so the problem may be bitrot in this code wrt TH. Quite happy to dig further myself if pointed in the right direction. {{{ Orac:~/work/hoc-read-only/hoc $ cabal build Compiling HOC_cbits... Building HOC-1.0... Preprocessing library HOC-1.0... [16 of 31] Compiling HOC.Invocation ( HOC/HOC/Invocation.hs, dist/build/HOC/Invocation.o ) HOC/HOC/Invocation.hs:14:1: Unacceptable argument type in foreign declaration: FFICif When checking declaration: foreign import ccall safe "static Invocation.h callWithExceptions" c_callWithExceptions :: FFICif -> FunPtr a -> Ptr b -> Ptr (Ptr ()) -> IO (Ptr ObjCObject) Orac:~/work/hoc-read-only/hoc $ cabal build Compiling HOC_cbits... Building HOC-1.0... Preprocessing library HOC-1.0... [ 7 of 31] Compiling HOC.FFICallInterface ( HOC/HOC/FFICallInterface.hs, dist/build/HOC/FFICallInterface.o ) [ 8 of 31] Compiling HOC.Arguments ( HOC/HOC/Arguments.hs, dist/build/HOC/Arguments.o ) [HOC.FFICallInterface changed] [11 of 31] Compiling HOC.CStruct ( HOC/HOC/CStruct.hs, dist/build/HOC/CStruct.o ) [HOC.FFICallInterface changed] [13 of 31] Compiling HOC.ID ( HOC/HOC/ID.hs, dist/build/HOC/ID.o ) [HOC.FFICallInterface changed] [16 of 31] Compiling HOC.Invocation ( HOC/HOC/Invocation.hs, dist/build/HOC/Invocation.o ) [17 of 31] Compiling HOC.ExternFunctions ( HOC/HOC/ExternFunctions.hs, dist/build/HOC/ExternFunctions.o ) HOC/HOC/ExternFunctions.hs:77:34: Ambiguous occurrence `unsafePerformIO' It could refer to either `Foreign.unsafePerformIO', imported from `Foreign' at HOC/HOC/ExternFunctions.hs:10:1-14 or `System.IO.Unsafe.unsafePerformIO', imported from `System.IO.Unsafe' at HOC/HOC/ExternFunctions.hs:11:1-23 (and originally defined in `GHC.IO') Orac:~/work/hoc-read-only/hoc $ cabal build Compiling HOC_cbits... Building HOC-1.0... Preprocessing library HOC-1.0... [17 of 31] Compiling HOC.ExternFunctions ( HOC/HOC/ExternFunctions.hs, dist/build/HOC/ExternFunctions.o ) [18 of 31] Compiling HOC.StdArgumentTypes ( HOC/HOC/StdArgumentTypes.hs, dist/build/HOC/StdArgumentTypes.o ) Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package array-0.4.0.1 ... linking ... done. Loading package deepseq-1.3.0.1 ... linking ... done. Loading package containers-0.5.0.0 ... linking ... done. Loading package pretty-1.1.1.0 ... linking ... done. Loading package template-haskell ... linking ... done. Loading package syb-0.3.7 ... linking ... done. Loading package bytestring-0.10.0.0 ... linking ... done. Loading package transformers-0.3.0.0 ... linking ... done. Loading package mtl-2.1.2 ... linking ... done. Loading package text-0.11.2.3 ... linking ... done. Loading package parsec-3.1.3 ... linking ... done. Loading package old-locale-1.0.0.5 ... linking ... done. Loading package old-time-1.1.0.1 ... linking ... done. Loading package fgl-5.4.2.4 ... linking ... done. Loading package filepath-1.3.0.1 ... linking ... done. Loading package time-1.4.0.1 ... linking ... done. Loading package unix-2.6.0.0 ... linking ... done. Loading package directory-1.2.0.0 ... linking ... done. Loading package binary-0.5.1.1 ... linking ... done. Loading package HUnit-1.2.5.1 ... linking ... done. Loading object (static) dist/build/HOC_cbits.o ... ghc: dist/build/HOC_cbits.o: Bad magic. Expected: feedfacf, got: feedface. ghc: panic! (the 'impossible' happened) (GHC version 7.6.1 for x86_64-apple-darwin): loadObj "dist/build/HOC_cbits.o": failed Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7603 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler