#2910: throwTo can block indefinitely when target thread finishes with
exceptions
blocked
-------------------+--------------------------------------------------------
Reporter: int-e | Owner:
Type: bug | Status: new
Priority: normal | Component: Runtime System
Version: 6.10.1 | Severity: normal
Keywords: | Testcase:
Os: Linux | Architecture: x86
-------------------+--------------------------------------------------------
{{{throwTo}}} can block indefinitely when the target thread has exceptions
blocked at thread creation time. The following test program demonstrates
this problem.
{{{
import Control.Exception
import GHC.Conc
main = do
t1 <- block $ forkIO yield
t2 <- forkIO $ killThread t1
threadDelay 1000000
threadStatus t1 >>= print
threadStatus t2 >>= print
}}}
can print (and does fairly reliably for me)
{{{
ThreadFinished
ThreadBlocked BlockedOnException
}}}
See also
http://www.haskell.org/pipermail/reactive/2009-January/000197.html
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2910>
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