#7490: ghc-stage1 panic when building a cross-compiler or cross-building a compiler ----------------------------------+----------------------------------------- Reporter: singpolyma | Owner: Type: bug | Status: new Priority: high | Milestone: 7.8.1 Component: Compiler | Version: 7.7 Keywords: cross-compilation | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Building GHC failed Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ----------------------------------+----------------------------------------- Comment(by simonmar): A bit more info, after I elaborated the panic: {{{ "inplace/bin/ghc-stage1" -static -H64m -O0 -package-name integer- simple-0.1.1.0 -hide-all-packages -i -ilibraries/integer-simple/. -ilibraries/integer-simple/dist-install/build -ilibraries/integer-simple /dist-install/build/autogen -Ilibraries/integer-simple/dist-install/build -Ilibraries/integer-simple/dist-install/build/autogen -Ilibraries/integer- simple/. -optP-include -optPlibraries/integer-simple/dist- install/build/autogen/cabal_macros.h -package ghc-prim-0.3.1.0 -package- name integer-simple -Wall -XHaskell98 -XCPP -XMagicHash -XBangPatterns -XUnboxedTuples -XForeignFunctionInterface -XUnliftedFFITypes -XNoImplicitPrelude -O -no-user-package-db -rtsopts -odir libraries /integer-simple/dist-install/build -hidir libraries/integer-simple/dist- install/build -stubdir libraries/integer-simple/dist-install/build -hisuf hi -osuf o -hcsuf hc -c libraries/integer-simple/./GHC/Integer/Type.hs -o libraries/integer-simple/dist-install/build/GHC/Integer/Type.o Top level: Bad interface file: libraries/integer-simple/dist- install/build/GHC/Integer/Type.hi libraries/integer-simple/dist-install/build/GHC/Integer/Type.hi: openBinaryFile: does not exist (No such file or directory) ghc-stage1: panic! (the 'impossible' happened) (GHC version 7.7.20130116 for arm-unknown-linux): initTcForLookup }}} So we're trying to read `Type.hi` while compiling the same module. This explains why it works the second time, after `Type.hi` has already been generated. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7490#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler