#8484: Compile-time panic -------------------------------------+------------------------------------- Reporter: Taymon | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Compile-time | (amd64) crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by zilinc): * status: closed => new * resolution: worksforme => Comment: {{{ zilinc@zilinc-dell-xps:~/research/haskell/panic-parsing$ cabal build --with-ghc=ghc-7.8.4 Building panic-parsing-0.1.0.0... Preprocessing executable 'panic-parsing' for panic-parsing-0.1.0.0... ghc: panic! (the 'impossible' happened) (GHC version 7.8.4 for x86_64-unknown-linux): While parsing "/home/zilinc/research/haskell/panic-parsing/.cabal- sandbox/x86_64-linux-ghc-7.10.2-packages.conf.d/package.cache": demandInput: not enough bytes Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} To reproduce it, I did: * create a new cabal package (`cabal init`), with a sandbox (`cabal sandbox init`) * create a Main module, can be as simple as: {{{#!hs module Main where main = putStrLn "done" }}} * create a `cabal.config` file, with {{{ with-compiler: ghc-7.10.2 with-hc-pkg: ghc-pkg-7.10.2 }}} * `cabal configure && cabal build`. everything should be okay so far * do `cabal build --with-ghc=ghc-7.8.4`, then I got panic What I did may not be correct, but either way `impossible` should not happen. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8484#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler