On Fri, Oct 28, 2011 at 12:47 PM, Brian Johnson
Hi, The second time I press control-c, it isn't caught -- the program exits instead. Why?
Interesting -- this works as you want with runghc, but it works as you describe when compiled with ghc --make. (under ghc 7.0.3 here as well.) --Rogan
(The context is, I'm writing an interactive program where calculations may take a long time. Control-c during a calculation should return the user to a prompt. As things stand, this can only be done once -- the second calculation so interrupted causes the whole program to exit.) $ ./ctrlctest ^Cuser interrupt ^C -- program exits! $ cat ctrlctest.hs module Main where import Control.Concurrent (threadDelay) import qualified Control.Exception as C main :: IO () main = do (threadDelay 1000000 >> return ()) `C.catch` (\e -> print (e::C.AsyncException)) main $ ghc --version The Glorious Glasgow Haskell Compilation System, version 7.0.3 $ uname -mrsv Darwin 11.2.0 Darwin Kernel Version 11.2.0: Tue Aug 9 20:54:00 PDT 2011; root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64 $ file ctrlctest ctrlctest: Mach-O executable i386
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