Connection to an admin siteaccess with debug turned on is impossible ; got this message :

After analyzing ezdebug.php, it appears that there is a bug :
Line 1321 :
if ( isset( $this->TimeAccumulatorList[$key]['recursive_counter'] ) )

... should be :
if ( isset( $debug->TimeAccumulatorList[$key]['recursive_counter'] ) )

With this correction, it's allright.

Steps to reproduce

Turn on debug in an admin siteaccess : in site.ini :

[TemplateSettings]
Debug=enabled

[DebugSettings]
DebugOutput=enabled

Then try to connect.