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Re^4: Attempt to free unreferenced scalar

by tqisjim (Beadle)
on Mar 20, 2013 at 15:12 UTC ( #1024535=note: print w/replies, xml ) Need Help??


in reply to Re^3: Attempt to free unreferenced scalar
in thread Attempt to free unreferenced scalar

Thanks again for the helpful response.

My understanding is that Perl will not try to free() a weak reference. But I seem to recall reading that a weak reference is copied as a strong reference. If true, that might explain everything, since the copy will trigger free() on memory already unallocated.

I'm probably out of my league, but I assume that a weak reference copy should also be weak. Is this behavior limited to 5.10 and 5.12? Certainly a neat and tidy explanation and a manageable workaround. You're probably the best resource for sanity checking that theory. And then, is it possible to confirm by rooting around the change logs?

It's always a exciting... and a little scary... to get so close to the internals ;)

  • Comment on Re^4: Attempt to free unreferenced scalar

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Re^5: Attempt to free unreferenced scalar
by ikegami (Pope) on Mar 24, 2013 at 07:22 UTC

    Weak refs just cause scalars to get undefined.

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