In XDebug 2.0.5 (stable), when remote debugging on a Debian server and a Debian client using "gdb" debugging mode, the following always causes a crash.

Type the following code and save it as test.php:
<?php
function Test() {
$q = array( 1, 2, 5 );
xdebug_break();
}
Test();
?>

Visit test.php with remote debugging enabled. Have a debugging client wait to accept remote connections, for example using netcat:

nc -lvvv -p 9000

Upon connection, issue "run" to start the script. The script will enter the Test function and break. Issue "next" to get out of the "xdebug_break" callstack and get ready to execute the "}" line of the function.

Issue a "show" or "show-locals". The program will immediately crash and disconnect from the debug client.