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23 results

xml.c

  • Tom Lane's avatar
    9f7a664f
    Avoid failure when selecting a namespace node in XMLTABLE. · 9f7a664f
    Tom Lane authored 
    It appears that libxml2 doesn't bother to set the "children" field of
an XML_NAMESPACE_DECL node to null; that field just contains garbage.
In v10 and v11, this can result in a crash in XMLTABLE().  The rewrite
done in commit 251cf2e2 fixed this, somewhat accidentally, in v12.
We're not going to back-patch 251cf2e2, however.  The case apparently
doesn't have wide use, so rather than risk introducing other problems,
just add a safety check to throw an error.

Even though no bug manifests in v12/HEAD, add the relevant test case
there too, to prevent future regressions.

Chapman Flack (per private report)
    9f7a664f
    History
    Avoid failure when selecting a namespace node in XMLTABLE.
    Tom Lane authored 
    It appears that libxml2 doesn't bother to set the "children" field of
an XML_NAMESPACE_DECL node to null; that field just contains garbage.
In v10 and v11, this can result in a crash in XMLTABLE().  The rewrite
done in commit 251cf2e2 fixed this, somewhat accidentally, in v12.
We're not going to back-patch 251cf2e2, however.  The case apparently
doesn't have wide use, so rather than risk introducing other problems,
just add a safety check to throw an error.

Even though no bug manifests in v12/HEAD, add the relevant test case
there too, to prevent future regressions.

Chapman Flack (per private report)