Internal error: throwTo: unrecognised why_blocked value
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
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.