'interrupted' when exiting

Hi, If I compile and run the attached program in the following way, it crashes on exit: $ ghc -threaded thr_interrupted.hs $ ./thr_interrupted thr_interrupted: Main_dtl: interrupted This is particularly bad when profiling, because the program terminates before writing to the .prof file. Is this a bug in GHC, or am I supposed to terminate the thread before exiting? If it's a GHC issue, how should it be fixed? It seems that the error was raised in the C stub code GHC generated for the foreign import "wrapper" function. Regards, Takano Akio