It appears that if I add
import Control.Concurrent
and call yield just after performGC then the finalizer does get called.
But it only seems to work if I call both performGC and yield and in
that order.
Is this normal and if so is it documented anywhere?
Can this behavior be relied upon in future versions of GHC?
How portable is this - I'm guessing performGC is not portable?
Ivan
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