Saxon

Under Saxon-PE 9.5, xsl:assert emitted a message when its test condition failed. 9.6 is no longer producing a message.

For example, given the XML

2

and the XSLT

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="3.0">

<xsl:template match="number">

<xsl:assert test=". eq '1'">The number must be 1!</xsl:assert>

<xsl:copy-of select="."/>

</xsl:template>

</xsl:stylesheet>

Saxon 9.5 sends the message "The number must be 1!" and terminates with an error code; Saxon 9.6 just terminates with error.