<document source="test data">
    <paragraph>
        Here are some bad cases:
    <substitution_definition names="symbol">
        <image alt="symbol" uri="symbol.png">
    <system_message level="2" line="4" source="test data" type="WARNING">
        <paragraph>
            Explicit markup ends without a blank line; unexpected unindent.
    <paragraph>
        No blank line after.
    <system_message level="2" line="6" source="test data" type="WARNING">
        <paragraph>
            Substitution definition "empty" missing contents.
        <literal_block xml:space="preserve">
            .. |empty|
    <system_message level="1" line="8" source="test data" type="INFO">
        <paragraph>
            No directive entry for "directive" in module "Text::Restructured::Directive".
            Trying "directive" as canonical directive name.
    <system_message level="3" line="8" source="test data" type="ERROR">
        <paragraph>
            Unknown directive type "directive".
        <literal_block xml:space="preserve">
            directive:: symbol.png
    <system_message level="2" line="8" source="test data" type="WARNING">
        <paragraph>
            Substitution definition "unknown" empty or invalid.
        <literal_block xml:space="preserve">
            .. |unknown| directive:: symbol.png
    <system_message level="2" line="10" source="test data" type="WARNING">
        <paragraph>
            Substitution definition "invalid 1" empty or invalid.
        <literal_block xml:space="preserve">
            .. |invalid 1| there's no directive here
    <system_message level="2" line="11" source="test data" type="WARNING">
        <paragraph>
            Substitution definition "invalid 2" empty or invalid.
        <literal_block xml:space="preserve">
            .. |invalid 2| there's no directive here
               With some block quote text, line 1.
               And some more, line 2.
    <system_message level="2" line="15" source="test data" type="WARNING">
        <paragraph>
            Substitution definition "invalid 3" empty or invalid.
        <literal_block xml:space="preserve">
            .. |invalid 3| there's no directive here
    <comment xml:space="preserve">
        | bad name | bad data
    <comment xml:space="preserve">
        |