This bug report applies to the following tests:
K2-Axes-86
K2-NameTest-32
K2-NameTest-64
K2-NameTest-65
K2-NameTest-71

The XQueryX conversion seems to convert <e a="foo">/attribute(a)
to

<xqx:pathExpr>
  <xqx:stepExpr>
    <xqx:filterExpr>
      <xqx:elementConstructor>
        <xqx:tagName>e</xqx:tagName>
        <xqx:attributeList>
          <xqx:attributeConstructor>
            <xqx:attributeName>a</xqx:attributeName>
            <xqx:attributeValue>foo</xqx:attributeValue>
          </xqx:attributeConstructor>
        </xqx:attributeList>
      </xqx:elementConstructor>
    </xqx:filterExpr>
  </xqx:stepExpr>
  <xqx:stepExpr>
    <xqx:xpathAxis>child</xqx:xpathAxis>
    <xqx:attributeTest>
      <xqx:attributeName>
        <xqx:QName>a</xqx:QName>
      </xqx:attributeName>
    </xqx:attributeTest>
  </xqx:stepExpr>
</xqx:pathExpr>

This should use the attribute axis, not the child axis, and causes problems in the tests listed above.