#14338: Simplifier fails with "Simplifier ticks exhausted" -------------------------------------+------------------------------------- Reporter: dredozubov | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Compile-time | (amd64) crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I can't even get to base-camp (with HEAD). cabal install (with `--allow- newer` else nothing at all works) says {{{ ....lots of stuff... Preprocessing library unordered-containers-0.2.8.0... [1 of 8] Compiling Data.HashMap.PopCount ( Data/HashMap/PopCount.hs, dist/build/Data/HashMap/PopCount.o ) [2 of 8] Compiling Data.HashMap.Unsafe ( Data/HashMap/Unsafe.hs, dist/build/Data/HashMap/Unsafe.o ) [3 of 8] Compiling Data.HashMap.Array ( Data/HashMap/Array.hs, dist/build/Data/HashMap/Array.o ) [4 of 8] Compiling Data.HashMap.UnsafeShift ( Data/HashMap/UnsafeShift.hs, dist/build/Data/HashMap/UnsafeShift.o ) [5 of 8] Compiling Data.HashMap.Base ( Data/HashMap/Base.hs, dist/build/Data/HashMap/Base.o ) [6 of 8] Compiling Data.HashMap.Strict ( Data/HashMap/Strict.hs, dist/build/Data/HashMap/Strict.o ) [7 of 8] Compiling Data.HashMap.Lazy ( Data/HashMap/Lazy.hs, dist/build/Data/HashMap/Lazy.o ) [8 of 8] Compiling Data.HashSet ( Data/HashSet.hs, dist/build/Data/HashSet.o ) Data/HashSet.hs:80:39: error: Module ‘Data.Semigroup’ does not export ‘Monoid(..)’ | 80 | import Data.Semigroup (Semigroup(..), Monoid(..)) | ^^^^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-22962/unordered- containers-0.2.8.0' Installed iproute-1.7.1 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14338#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler