[bug #38474] Unintended (?) behaviour change of -perm +mode predicate

[Eric Blake]

Follow-up Comment #5, bug #38474 (project findutils):

By my reading, '-perm +0100' is indeed unspecified by POSIX (POSIX only calls
out symbolic mode, not numeric mode), so we get to choose how to handle it
(the confusion with leading + is applicable to only things like '-perm +u+x').
 I see two possible choices that make the most sense for how we should handle
it: 1. make it behave the way it used to (no regression), or 2. make it return
an error.  Having it silently change behavior from the old way is not nice. 
I'm 60:40 towards changing it to be an error instead of fixing it to behave
the way it used to.


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