schedule: re-entered unsafely - with heavy concurrent load

Simon Marlow simonmar at
Fri Feb 18 18:01:19 EST 2005

On 18 February 2005 22:15, Einar Karttunen wrote:

> I am having problems with the threaded rts (6.5.20050207)
> dying with 'schedule: re-entered unsafely'. The same code
> seems to work with 6.2.2 with threaded rts.
> The exact error message is:
> "foo: schedule: re-entered unsafely.
>    Perhaps a 'foreign import unsafe' should be 'safe'?"

I fixed a bug that might cause this in the last couple of days.  Could
you try again with a fresh build and let us know if the problem still


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