#7574: Register allocator chokes on certain branches with literals ---------------------------------+------------------------------------------ Reporter: thoughtpolice | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (NCG) | Version: 7.7 Keywords: ncg, codegen | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Compile-time crash Difficulty: Unknown | Testcase: Blockedby: 7573 | Blocking: Related: #7571,#7534 | ---------------------------------+------------------------------------------ Changes (by Feuerbach): * cc: roma@… (added) Comment: This bug also affects the "statistics" library. To reproduce, try to install statistics-0.10.2.0 from hackage with profiling enabled using GHC HEAD. It fails with a similar message {{{ [ 4 of 39] Compiling Statistics.Transform ( Statistics/Transform.hs, dist/build/Statistics/Transform.p_o ) ghc-stage2: panic! (the 'impossible' happened) (GHC version 7.7.20130407 for i386-unknown-linux): allocateRegsAndSpill: Cannot read from uninitialized register %vI_cdUj }}} -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7574#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler