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http://bugs.exim.org/show_bug.cgi?id=1503
--- Comment #5 from Zoltan Herczeg <hzmester@???> 2014-07-14 15:14:17 ---
Hi,
> My question is why the trailing /a?/ generates 'a?+' in the output?
The auto-possessification optimization.
> I try to back-port this patch, and after porting, 8.33 gives 'a?' only.
We have been redesigned that optimization recently. If you want to disable this
optimization, pass the O flag:
/(((a\2)|(a*)\g<-1>))*a?/BZO
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