#5361: regSpill: out of spill slots! -----------------------------------------------------+---------------------- Reporter: markwright | Owner: igloo Type: bug | Status: closed Priority: highest | Milestone: 7.2.1 Component: Compiler | Version: 7.1 Resolution: fixed | Keywords: regSpill panic impossible Os: Linux | Architecture: x86_64 (amd64) Failure: Compile-time crash | Difficulty: Testcase: http://hackage.haskell.org/package/SHA | Blockedby: Blocking: | Related: -----------------------------------------------------+---------------------- Changes (by Targen): * cc: targen@… (added) Comment: This just bit me in 7.7 trying to compile SHA-1.6.1 — same spot, I believe: {{{ $ ghc Data/Digest/Pure/SHA.hs -O -fregs-graph [1 of 1] Compiling Data.Digest.Pure.SHA ( Data/Digest/Pure/SHA.hs, Data/Digest/Pure/SHA.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.7 for i386-unknown-linux): regSpill: out of spill slots! regs to spill = 1743 slots left = 677 }}} The GHC invocation issued by cabal-install was quite longer, of course — that’s as minimal as I managed to get it. There is no error if I remove either -O or -fregs-graph. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/5361#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler