installHandler, sleep, and interrupts.

[Anders Lau Olsen]

When interrupting this program, the signal handler does not get called:

    module Main where
    import Posix

    main = do
        installHandler 2 (Catch (putStrLn "Hello, world!")) Nothing
        sleep 600
        -- putStr ""

Curiously, if the last line is uncommented, the program works as expected:

    % ./program
    ^C
    Hello, world!

This is for GHC version 5.02, run on Linux 2.2.5-15.

Anders Lau Olsen