I am toying around with various optimizations to see which are safe to
use with perl on my system (amd64 -current).  With my current set of
flags, the whole test suite passes except for ~6 thread tests, all of
which complain about unbalanced contexts, e.g.:

Unbalanced saves: 15 more saves than restores
Unbalanced context: 2 more PUSHes than POPs
../ext/threads/t/end........................dubious
        Test returned status 0 (wstat 139, 0x8b)
DIED. FAILED test 6

(This was running ${WRKSRC}/t/harness, which I was using in an attempt
to figure out what was going on; same error as the test suite, just
more verbose, obviously).

I've looked on google, etc. for some kind of elucidation of this
error; no luck, just people reporting it [under windows].  I am
running the test suite now with perl built with only -O2, so we'll
see.  My guess is that this has to do with -frename-registers and/or
-fweb, but that's just a guess.

Regardless of what's causing these errors, however, I'd like to
understand what's going on.

Anyone want to clue me in on this? ;)

Thanks,

--Blair

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