call xdebug_get_function_stack() from within __get() magic method

attached file contains
index.php simply includes include.php
include.php calls ClassA::getInstance()-bogusProperty
ClassA __get method calls xdebug_get_function_stack()

produces this backtrace:

array (size=3)
0 =>
array (size=4)
'function' => string '{main}' (length=6)
'file' => string '/Users/bkent/Sites/xdebug_bug/index.php' (length=39)
'line' => int 0
'params' =>
array (size=0)
empty
1 =>
array (size=4)
'file' => string '/Users/bkent/Sites/xdebug_bug/index.php' (length=39)
'line' => int 22
'params' =>
array (size=0)
empty
'include_filename' => string '/Users/bkent/Sites/xdebug_bug/include.php' (length=41)
2 =>
array (size=6)
'function' => string '__get' (length=5)
'type' => string 'dynamic' (length=7)
'class' => string 'ClassA' (length=6)
'file' => string '/Users/bkent/Sites/xdebug_bug/index.php' (length=39)
'line' => int 3
'params' =>
array (size=0)
empty

The last frame has the correct line number, but the wrong file
the correct file is seen in stack[1]['include_filename']