#8205: the 'impossible' happened : expectJust block_order ----------------------------------------+---------------------------------- Reporter: erikd | Owner: jstolarek Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.7 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Building GHC failed | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: ----------------------------------------+---------------------------------- Comment (by kazu-yamamoto): I installed GHC head on 32bit Linux today and tried to install mighttpd2. But I got the following error: {{{ Building vault-0.2.0.4... Failed to install vault-0.2.0.4 Last 10 lines of the build log ( /home/kazu/work/mighttpd2/.cabal- sandbox/logs/vault-0.2.0.4.log ): Preprocessing library vault-0.2.0.4... [1 of 4] Compiling Data.Unique.Really ( src/Data/Unique/Really.hs, dist /dist-sandbox-a79d14af/build/Data/Unique/Really.o ) [2 of 4] Compiling Data.Vault.ST_GHC ( src/Data/Vault/ST_GHC.hs, dist /dist-sandbox-a79d14af/build/Data/Vault/ST_GHC.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.7.20130920 for i386-unknown-linux): allocateRegsAndSpill: Cannot read from uninitialized register %vI_s4Zf Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} What should I do? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8205#comment:36 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler