#1620: Bug in debugger 6.7.20070817 -------------------------------------+------------------------------------ Reporter: guest | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: GHCi | Version: 6.7 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by pupfish): * cc: hvr (added) * failure: => None/Unknown Comment: I get the same error in 7.8.2 (using ghc-7.8.2-i386-unknown-linux- deb7.tar.xz from [http://www.haskell.org/ghc/download_ghc_7_8_2]): {{{ GHCi, version 7.8.2: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude> :cd ticket-1620/ Prelude> :l qsort.hs [1 of 1] Compiling Main ( qsort.hs, interpreted ) Ok, modules loaded: Main. *Main> :break 2 Breakpoint 0 activated at qsort.hs:2:16-47 *Main> :cd .. Warning: changing directory causes all loaded modules to be unloaded, because the search path has changed. Prelude> :cd ticket-1620/ Prelude> :l qsort.hs Failed to load interface for `Main' Use -v to see a list of the files searched for. Prelude> :l qsort.hs *** Exception: ModBreaks.modBreaks_array not initialised Prelude> }}} Contents of qsort.hs (from chapter [http://www.haskell.org/ghc/docs/latest/html/users_guide/ghci- debugger.html 2.5. The GHCi Debugger] in the GHC user's guide): {{{ qsort [] = [] qsort (a:as) = qsort left ++ [a] ++ qsort right where (left,right) = (filter (<=a) as, filter (>a) as) main = print (qsort [8, 4, 0, 3, 1, 23, 11, 18]) }}} I can't seem to load any other files (even in a different directory) when this error occurs. I have to restart GHCi in order for it to work correctly again. I usually trigger this error by typing ":c" and accidentally hitting enter instead of typing ":co" (":continue"). I'm not sure if it's related to #1650, which was fixed by commit [https://github.com/ghc/ghc/commit/e2782137c799a08711cac0844418cc0345a7ceb5 e2782137c7]. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/1620#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler