[Haskell-cafe] Novel error triggered building aeson on Mac

[Vanessa McHale]

Hi all,

I recently ran into the following interesting bug (reproducible on Mac; I used ghcup to install GHC and cabal-install):

cabal unpack aeson-1.2.1.0

cabal build -w ghc-8.0.2

(yields this error log)

Configuring library for aeson-1.2.1.0..
Preprocessing library for aeson-1.2.1.0..
Building library for aeson-1.2.1.0..
[ 1 of 23] Compiling Data.Attoparsec.Time.Internal ( attoparsec-iso8601/Data/Attoparsec/Time/Internal.hs, dist/build/Data/Attoparsec/Time/Internal.o )
[ 2 of 23] Compiling Data.Attoparsec.Time ( attoparsec-iso8601/Data/Attoparsec/Time.hs, dist/build/Data/Attoparsec/Time.o )
[ 3 of 23] Compiling Data.Aeson.Types.Internal ( Data/Aeson/Types/Internal.hs, dist/build/Data/Aeson/Types/Internal.o )
[ 4 of 23] Compiling Data.Aeson.Types.Generic ( Data/Aeson/Types/Generic.hs, dist/build/Data/Aeson/Types/Generic.o )
[ 5 of 23] Compiling Data.Aeson.Parser.UnescapePure ( pure/Data/Aeson/Parser/UnescapePure.hs, dist/build/Data/Aeson/Parser/UnescapePure.o )
[ 6 of 23] Compiling Data.Aeson.Parser.Unescape ( Data/Aeson/Parser/Unescape.hs, dist/build/Data/Aeson/Parser/Unescape.o )
[ 7 of 23] Compiling Data.Aeson.Parser.Time ( Data/Aeson/Parser/Time.hs, dist/build/Data/Aeson/Parser/Time.o )
[ 8 of 23] Compiling Data.Aeson.Parser.Internal ( Data/Aeson/Parser/Internal.hs, dist/build/Data/Aeson/Parser/Internal.o )
<command line>: can't load .so/.DLL for: /Users/vmchale/.cabal/store/ghc-8.0.2/lib/libHStm-lcl-cmpt-0.1.1.5-83154f89-ghc8.0.2.dylib (dlopen(/Users/vmchale/.cabal/store/ghc-8.0.2/lib/libHStm-lcl-cmpt-0.1.1.5-83154f89-ghc8.0.2.dylib, 5): REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB has segment 2 which is not a writable segment (__LINKEDIT) in /Users/vmchale/.cabal/store/ghc-8.0.2/lib/libHStm-lcl-cmpt-0.1.1.5-83154f89-ghc8.0.2.dylib)

Seems to be new; I guess the past libraries didn’t trigger it? I can’t tell if it’s a cabal-install bug, GHC bug, mac novelty… 

Cheers,
Vanessa McHale