Re: crash on irix with 64 bit abi

[Richard Stallman]

This is a crash in GC, so it is probably due to corrupt data.
It crashed in this codex:

    while (vector)
      if (!(vector->size & ARRAY_MARK_FLAG))

so perhaps the chain that is supposed to hold all vectors and
vectorlike objects was clobbered.

You could add code to record a ring buffer of
the last N vector addresses looked at; when it crashes,
you can look back through that ring buffer to find
the last "vector" that really is a vector
and has a pointer in it to something that isn't a vector.

Then you may be able to figure out what sort of an object that is,
which may help in figuring out where it got clobbered.