#14959: Heep overflow in optimizer -------------------------------------+------------------------------------- Reporter: darchon | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Compiling the following with optimisations: {{{ module Test where import Data.Bits (setBit) f = foldl setBit 0 [x | (x,_) <- zip [0..] [1]] :: Integer }}} fails with: {{{ $ ghc -O0 -fforce-recomp Test.hs [1 of 1] Compiling Test ( Test.hs, Test.o ) $ ghc -O -fforce-recomp Test.hs [1 of 1] Compiling Test ( Test.hs, Test.o ) ghc: panic! (the 'impossible' happened) (GHC version 8.4.1 for x86_64-unknown-linux): heap overflow }}} Fails on 8.0.2, 8.2.2, and 8.4.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14959 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler