#4811: Internal error: throwTo: unrecognised why_blocked value
-------------------------------+--------------------------------------------
Reporter: mitar | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.1 | Keywords:
Testcase: | Blockedby:
Os: Linux | Blocking:
Architecture: x86_64 (amd64) | Failure: None/Unknown
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I am getting this error:
{{{
internal error: throwTo: unrecognised why_blocked value
(GHC version 7.1.20101124 for x86_64_unknown_linux)
Please report this as a GHC bug:
http://www.haskell.org/ghc/reportabug
}}}
Sadly I was unable to make a simple test case. It is a program build upon
[http://hackage.haskell.org/package/Etage Etage] with heavy FFI (X11,
webcam capture, [http://hackage.haskell.org/package/NXT NXT interface])
and threading.
Problem is reproducible. It does not happen always, but in let's say 10 %
of program runs. Program is compiled with `-threaded -O2` and it happens
only if I pass `+RTS -N2` (or bigger `-N`) parameter. With only `-N1` it
seems it does not happen.
If somebody wants I can send him/her whole program. You do not need a
webcam or NXT as this happens when there is nothing connected to the
computer and program prematurely exists because of this.
Or you can guide me what and how should I debug.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4811>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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