#729 Array Index -1 in preceding-sibling

[Michael Kay]

An ArrayIndexOutOfBoundsException (with index -1) occurs when using a TailIterator with the preceding-sibling axis on a TinyTree. Typical query:

<xsl:template match="/">
<xsl:apply-templates <br=""> select="root/*/preceding-sibling::* [@attrib='x'][position() > 1]"/>
</xsl:template>

Occurs in 8.9.0.4 and probably many previous releases; fixed in 9.0.

Caused because PrecedingSiblingEnumeration fails if next() is called after a previous call on next() has returned null indicating end of sequence; and TailIterator calls next() twice if the sequence is empty.

[Michael Kay]

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Fixed in 9.0.0.1