Thanks for attempting to cut down the problem. I had a sense of déjà vu here. A while back I fixed a bug in OS.Process.sleep that was exactly this problem but it seems that the bug was left in Posix.Process.sleep. I've committed a fix to git master that seems to fix it. It could be worth adding this and a few other fixes to the fixes branch and perhaps making a new release.

David

On 22/04/2016 08:48, Michael Norrish wrote:
The attached tarball (derived from a prefix of the HOL4 sources)
reliably (every one of the tens of attempts I've made so far) crashes
PolyML 5.6 on my Macbook Pro with

Assertion failed: (save_vec_addr < save_vec+1000), function push,
file save_vec.cpp, line 70. Abort trap: 6

Just change into the crashpoly directory and do

poly --use usethis.ML

If the call to Posix.Process.sleep in multiLib.sml is made for a much
shorter length of time (pass 15 instead of 15000 to the genthms call,
say), it works as expected.  I also got 3/3 crashes with the time
delay at 5000.

I have tried to remove extraneous material from the tarball, but I'd
be very surprised if it was minimal.

Michael



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