id summary reporter owner description type status priority milestone component version resolution keywords cc os architecture failure difficulty testcase blockedby blocking related 968 "MkExternalCore died: can't handle ""foreign label"" declarations" Samuel Bronson "I ran into this when trying to build the whole libraries with {{{-fext-core}}}: {{{ == make way=p all; PWD = /home/samb/ghc-patched/libraries/readline ------------------------------------------------------------------------ ../../compiler/ghc-inplace -H32m -O -fasm -W -fno-warn-unused-matches -fwarn-unused-imports -Iinclude -package-name readline-1.0 -O -dcore-lint -W -fno-warn-unused-matches -fwarn-unused-imports -fext-core -package base -fgenerics -hisuf p_hi -hcsuf p_hc -osuf p_o -prof -c System/Console/Readline.hs -o System/Console/Readline.p_o -ohi System/Console/Readline.p_hi System/Console/Readline.hsc:458:17: Warning: Defined but not used: data constructor `KeymapTag' DsForeign: why is there an unsafeCoerce here? (many of that last line) NOTE: Simplifier still going after 4 iterations; bailing out. NOTE: Simplifier still going after 4 iterations; bailing out. WARNING: file stranal/DmdAnal.lhs line 436 ds{v X2Ku} [lid] (many similar lines with different variable names) ghc-6.5: panic! (the 'impossible' happened) (GHC version 6.5 for i386-unknown-linux): MkExternalCore died: can't handle ""foreign label"" declarations Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}}" bug closed normal External Core 6.7 fixed Unknown/Multiple Unknown/Multiple Unknown