fix: namespace nodes behave with compaction #2658
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peterzhu2118
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Oct 6, 2022
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Interesting! Valgrind caught a problem: https://github.com/sparklemotion/nokogiri/actions/runs/3256748720/jobs/5347591384#step:7:3223 |
I haven't used it in years, TBH, and what it does is completely insufficient to debug memory issues in modern Ruby anyway.
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🤯 So fixing compaction for namespaces has caught a long-standing use-after-free bug in in the |
Co-Authored-By: Matt Valentine-House <matt@eightbitraptor.com> Co-Authored-By: Peter Zhu <peter@peterzhu.ca>
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This was referenced Oct 18, 2022
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What problem is this PR intended to solve?
Under certain circumstances, GC compaction will cause a segfault when accessing wrapped
XML::Namespaceobjects.See previous similar work at #2579
This fix, if merged, should be backported to v1.13.x and released as a bugfix.
Have you included adequate test coverage?
Yes, repro test is included thanks to @eightbitraptor and @peterzhu2118
Does this change affect the behavior of either the C or the Java implementations?
No functional behavior changes.