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Postings from January 2018
This problem isn't actually with Algorithm-QuineMcCluskey, but with
List-MoreUtils-XS. It's another GvSV refcounting bug in List-MoreUtils-XS
that is being uncovered by having fixed pp_sort. We previously saw a
similar failure in List-MoreUtils-XS's own test suite, [perl #132578].
A new version of List-MoreUtils-XS has been released which doesn't fail
in its own test suite, but still has GvSV refcounting bugs. The one
hitting Algorithm-QuineMcCluskey is with pairwise():
$ perl -MDevel::Peek=Dump -MList::MoreUtils::XS=pairwise -lwe 'pairwise { } @{["0"]}, @{["0"]}; Dump $a; Dump $b'
SV = UNKNOWN(0xff) (0xfecab0) at 0xfc9128
REFCNT = 0
FLAGS = ()
SV = UNKNOWN(0xff) (0xfecb88) at 0xfecac8
REFCNT = 0
FLAGS = ()
This bug falls within the scope of [rt.cpan.org #123868] that I opened
in response to [perl #132578]. I'll add a comment to it about this
particular problem.
-zefram
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