SMP + FFI = crash...
Source code will be attached. This is a modified version of bug #705: each thread calls a safe C function via FFI. The normal behavior of the program is to loop forever. The program works fine using +RTS -N1, but when using +RTS -N2 or more threads on a SMP machine, it crashes nondeterministically with all kinds of funny error messages. I can reproduce it on difference linux SMP machines.
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