Nice.

With the development version of the Debug Bar you will get the simple backtrace for Deprecated function calls / includes too. Of course this only catches the ones on pages you interact with as a (Super) Admin user. Being able to find these more easily was one of the reasons this came about 🙂

Let’s see if this sample code will paste:

function plugin_backtrace() {
var_dump(debug_backtrace());
}

add_action( ‘deprecated_argument_run’, ‘plugin_backtrace’ );
add_action( ‘deprecated_function_run’, ‘plugin_backtrace’ );

Yep, and you have to handle WP_Errors before you try using them 🙂

True, but you do have to catch them before they run away 😉