isTrue# doesn't work in ghci anymore

GHCi, version 8.1.20161028: http://www.haskell.org/ghc/  :? for help
Prelude> :set -XMagicHash 
Prelude> :m + GHC.Types
Prelude GHC.Types> isTrue# 123#
True
Prelude GHC.Types> [1]    3181 segmentation fault  ghc-stage2 --interactive

This is also the reason why #12718 (closed) is segfaulting. I'm currently working on this.

isTrue# is failing in 8.0.1 too.

Edited Mar 10, 2019 by Ömer Sinan Ağacan

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