id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
18232	wp_nav_menu - Setting walker parameter affects fallback_cb	bryanjwatson		"When using the walker parameter with wp_nav_menu and there is no menu present, wp_nav_menu falls back by default (set with fallback_cb) to wp_page_menu. It appears that the set walker also affects wp_page_menu, which in most cases breaks the output.

wp_nav_menu usage:
{{{
<?php wp_nav_menu(array('walker'=> new Walker_Nav_Menu)); ?>
}}}

Output when no menu is present (falling back on wp_page_menu):
{{{
// Formatted for readability
<div class=""menu"">
	<ul>
		<li id=""menu-item-1"" class=""menu-item-1""><a></a></li>
		<li id=""menu-item-2"" class=""menu-item-2""><a></a></li>
		<li id=""menu-item-3"" class=""menu-item-3""><a></a></li>
	</ul>
</div>
}}}

Expected output:
{{{
// Formatted for readability
<div class=""menu"">
	<ul>
		<li class=""page_item page-item-1""><a href=""/first/"" title=""First"">First</a></li>
		<li class=""page_item page-item-2""><a href=""/second/"" title=""Second"">Second</a></li>
		<li class=""page_item page-item-3""><a href=""/third/"" title=""Third"">Third</a></li>
	</ul>
</div>
}}}

As you can see, the output from wp_page_menu is getting filtered through the walker, but since the walker was designed for menus specifically, it renders the default output from wp_page_menu useless (empty tags..etc)."	defect (bug)	new	normal	Awaiting Review	Menus	3.2.1	normal		has-patch needs-testing	marko@… BenjaminRMueller