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action:

open a XHTML file (sample.html)

result:

data is imported as expected but causes unexpected messages on the console:

sample.html:2: HTML parser error : Misplaced DOCTYPE declaration sample.html:2: HTML parser error : htmlParseStartTag: misplaced sample.html:2: HTML parser error : htmlParseStartTag: misplaced

tag sample.html:21: HTML parser error : htmlParseStartTag: misplaced tag

cause:

html_file_open in plugins/html/html_read.c treats leading bytes as Byte Order Marks even if they aren't part of a BOM but actual content ("<?xm") thus using the wrong offset for htmlCreatePushParserCtxt

solution:

see attached html_bom_handling.patch

Since libxml 2.7.2 (Oct 3 2008) it is no longer necessary to remove BOMs thus the #if-#endif part can be removed for all non-ancient systems.