<document source="test data">
<paragraph>
An if directive in substitution definition whose content returns an error.
<system_message level="1" line="3" source="test data" type="INFO">
<paragraph>
No directive entry for "if" in module "Text::Restructured::Directive".
Trying "if" as canonical directive name.
<system_message level="4" line="2" source="if directive at test data, line 3" type="SEVERE">
<paragraph>
Unexpected section title.
<literal_block xml:space="preserve">
Bogus header
============
<system_message level="3" line="3" source="test data" type="ERROR">
<paragraph>
Error in "if" directive within substitution definition: may contain a single paragraph only.
<system_message level="2" line="3" source="test data" type="WARNING">
<paragraph>
Substitution definition "error" empty or invalid.
<literal_block xml:space="preserve">
.. |error| if:: 1
\n\
Bogus header
============