Different row-spacing in footer with a dynamic page number field, causes the renderer to crash.

[erobwen]

If you create a footer with a different row spacing and a dynamic page numger field, the renderer will crash, similar to this:

Error
Index -2 out of bounds for length 37

Note: It will NOT crash if the dynamic field is in a header instead of a footer.

Here is a minimal obfl file that will trigger the crash.

    <obfl version="2011-1" hyphenate="{$hyphenate}" mark-capital-letters="{$mark-capital-letters}">
      <xsl:attribute name="xml:lang">
        <xsl:value-of select="$lang"/>
      </xsl:attribute>
      <layout-master duplex="false" inner-margin="2" name="main" outer-margin="2" page-height="28" page-width="32" row-spacing="2">
        <default-template>
          <footer row-spacing="1"> <!-- Row spacing crashes the renderer together with field below.  -->
            <field>
              <current-page number-format="default"/>
            </field> 
            <!-- Field above crashes the renderer together with row spacing.  -->
          </footer>
        </default-template>
      </layout-master>
      <sequence master="main">
        <block>
          <text>Test</text>
       </block>
      </sequence>
    </obfl>