Hi SPJ, it seems as if your latest commit “Improve the desugaring of RULES, esp those from SPECIALISE pragmas” broke the build (when building with -Werror and -dcore-lint): libraries/array/Data/Array/Base.hs:476:1: Warning: Forall'd constraint ‘Ix i’ is not bound in RULE lhs showsIArray @ UArray @ i @ e $dIArray_a4L0 $dIx_a4L9 $dShow_a4L2 $dShow_a4L3 <no location info>: Failing due to -Werror. make[1]: *** [libraries/array/dist-install/build/Data/Array/Base.o] Error 1 Full build log at https://api.travis-ci.org/jobs/31427050/log.txt?deansi=true Greetings, Joachim -- Joachim “nomeata” Breitner mail@joachim-breitner.de • http://www.joachim-breitner.de/ Jabber: nomeata@joachim-breitner.de • GPG-Key: 0xF0FBF51F Debian Developer: nomeata@debian.org