"Cannot use $this as lexical variable" message still in PHP 5.4

While

 <?php
 class a {
     public function b() {
         $f = function () {
             $this->c();
         };
     }
 }

compiles as expected with PHP 5.4, the following

 <?php
 class a {
     public function b() {
         $f = function () use ($this) {
             $this->c();
         };
     }
 }

results in

Fatal error: Cannot use $this as lexical variable in ...

This is because

 void zend_do_fetch_lexical_variable(znode *varname,
 zend_bool is_ref TSRMLS_DC) /* {{{ */
 {
     znode value;

     if (Z_STRLEN(varname->u.constant) == sizeof("this") - 1 &&
         memcmp(Z_STRVAL(varname->u.constant), "this",
         sizeof("this") - 1) == 0) {
         zend_error(E_COMPILE_ERROR, "Cannot use $this as lexical
         variable");
         return;
     }

is still in zend_compile.c. IIRC, this code was added in PHP 5.3 to
prevent $this from being used as a lexical variable. It should no
longer be required in PHP 5.4. Right?

--
Sebastian Bergmann Co-Founder and Principal Consultant
http://sebastian-bergmann.de/ http://thePHP.cc/