[xml] Losing _private for external entities [Was: What is the _private field actually for?]

[Michael Day <mikeday yeslogic com>]

Hi Daniel,

>   Sure, it is likely to end up being in or around 
> xmlParseExternalEntityPrivate() in parser.c though it already copies
> _private if oldctxt is provided. I could chase this, I may be a bit faster
> than you, but having other people learn about the code is IMHO a good thing
> so if you're not afraid, go for it, definitely !

The problem seems to be here: xmlParseCtxtExternalEntity calls 
xmlCreateEntityParserCtxt, which creates a new parser context from 
nothing and does not take an old parser context to copy the _private 
data from.

Would the best way to fix it be to just pass a context into 
xmlCreateEntityParserCtxt, or perhaps just pass in the value of _private 
to be copied into the new context?

Cheers,

Michael

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