David,
We have noticed some interesting behaviour with the state saving in
Poly/ML 5.2/5.2.1--- possibly a sign that something isn't quite as intended.
If poly is started and the command
PolyML.SaveState.saveState "test";
is repeatedly entered, a segmentation fault eventually occurs. On my
machine it always happens after 22 times. With the debug level set to 2
or 3, we get:
Bad pointer 0x0d479050 found
Aborted
If we enter
PolyML.fullGC ();
just before the 22nd go, there is no segmentation fault. However,
continuing to enter the original save state command results in the exception
Exception- SysErr ("Out of Memory", SOME ENOMEM) raised
after 8 more goes.
We found this example more by chance. We have had a few other
repeatable segmentation faults when saving the state but on very large
examples and these are hard to reduce down. (They may be related to the
above issue.) In each case, the segmentation fault could be avoided by
executing PolyML.fullGC first. Generally, if we cannot create an SML
script that generates an error, what is the best way to track down an issue?
Thanks,
Phil
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