Bug#902779: perl-debug: XS code built for perl doesn't work with debugperl
Niko Tyni
ntyni at debian.org
Sat Jun 30 20:06:34 BST 2018
Package: perl-debug
Version: 5.28.0-1
Severity: normal
User: debian-perl at lists.debian.org
Usertags: perl-5.28-transition
I noticed that many of our XS module packages are incompatible
with debugperl after being rebuilt for 5.28. Consider:
# debugperl -MDateTime -e 'print DateTime->today'
panic: XSUB DateTime::_rd2ymd (DateTime.c) failed to extend arg stack: base=55b63e6b3b48, sp=55b63e6b3b80, hwm=55b63e6b3b68
# printf '<AAA>\n<DDD/><CCC><DDD>\n</DDD></CCC>\n</AAA>' | debugperl -MXML::LibXML -e 'XML::LibXML->new->parse_fh(*STDIN)->documentElement->childNodes; '
panic: XSUB XML::LibXML::Node::_childNodes (LibXML.c) failed to extend arg stack: base=561827c61b48, sp=561827c61b68, hwm=561827c61b60
This panic is due to a new -DDEBUGGING check that guards the XS function
argument stack, making sure that XS code extends the stack properly when
it pushes elements there.
However, I believe the check isn't currently working properly when
the XS code is built with a non-DDEBUGGING perl.h and then run with a
-DDEBUGGING perl build.
Will take this upstream once I've investigated it properly.
--
Niko Tyni ntyni at debian.org
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