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1abf2967
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2020-08-06T17:51:57
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Fix exponential runtime and memory in xi:fallback processing
When creating XML_XINCLUDE_START nodes, the children of the original
xi:include node must be freed, otherwise fallback content is copied
twice, doubling runtime and memory consumption for each nested
xi:fallback/xi:include pair.
Found with libFuzzer.
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