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add test for, and update comments for, old defined($1) oddity.
authorDave Mitchell <davem@fdisolutions.com>
Mon, 18 Jun 2007 00:00:30 +0000 (00:00 +0000)
committerDave Mitchell <davem@fdisolutions.com>
Mon, 18 Jun 2007 00:00:30 +0000 (00:00 +0000)
Some code in regexec.c had a comment to the effect that without
this code, Dynaloader failed (this is back at 5.6.0). Replace the
comments with something more specific, and add a test for it
(basically without the code $1 is '' rather than undefined
sometimes).

p4raw-id: //depot/perl@31408


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