bug#17168: 24.3.50; Segfault at mark_object

[Dmitry Antipov]

On 04/03/2014 01:08 PM, Daniel Colascione wrote:

> Found the bug: that symbol's name is in pure storage, so we ignore the
> value of sym->s.gcmarkbit and assume the symbol is always live: we
> never put it on the free list, so we never set its function slot to
> Vdead. Later, during another GC pass, conservative GC scanning happens
> to find a pointer to the symbol. We begin marking it, descend into the
> function slot, which is still pointing to the old, dead object value. We
> try to mark memory being used for some other purpose and enter la-la land.

What about this workaround? Until we find a better solution,
this should prevent crashes at least.

Dmitry

bug17168_workaround.patch
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