#10375: arm: ghci hits an illegal instruction -------------------------------------+--------------------------------- Reporter: erikd | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.10.2 Component: GHCi | Version: 7.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: arm Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+--------------------------------- Comment (by erikd): This is definitely not statically linked (the `lld` command shows dynamically linked Haskell libraries like `haskeline`, `terminfo`, `transformers` as well as the usual C library suspects. Debugging this in GDB is *really* difficult. Firstly, I can only recreate the problem when running with `--interactive`. Secondly, GDB and `ghc- stage2 --interactive` both try to take control of the same terminals so I have to start the `ghc-stage2 --interactive` process and connect gdb to it with `gdb -p $(pidof ghc-stage2)`. The `.gchi` file contains: {{{ putStr "Continue ... " _ <- getChar putStrLn "ok" data X = Y deriving Eq Y == Y }}} The `getChar` is there to pause the `ghc-stage2` process long enough to attach GDB. Unfortunately, this means that the number of passes through the code I'm trying to debug is not deterministic which makes setting a breakpoint rather difficult. I am currently playing around with replacing `getChar` with `threadDelay` to see if I can make it determinisitc. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10375#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler