This is a Zend Engine 2 problem I guess...
Can you elaborate on this 'bug'? Why do you think it's wrong? Can you show us a script, etc...

Well, you would expect yacc to return the static_scalar 
rather than the '+' of this rule ... Here is a script that 
demonstrates the problem ...

<?
  static $a = +1;
  static $b = -1;

  echo $a."\n";
  echo $b."\n";
?>


This gives the output ...

2969616
-1


Which as you can see, isn't entirely correct!

This is in fact a bug, and changing the grammar file as 
suggested by othalla@wp.pl fixes this problem.  Here is a 
diff to do it ...


--- zend_language_parser.y      Sat Jun 22 15:12:41 2002
+++ zend_language_parser.old    Sat Jun 22 15:18:26 2002
@@ -608,7 +608,7 @@
 static_scalar: /* compile-time evaluated scalars */
                common_scalar           { $$ = $1; }
        |       T_STRING                { 
zend_do_fetch_constant(&$$, NULL, &$1, ZEND_CT TSRMLS_CC); 
}
-       |       '+' static_scalar       { $$ = $2; }
+       |       '+' static_scalar       { $$ = $1; }
        |       '-' static_scalar       { zval minus_one;  
minus_one.type = IS_LONG; minus_one.value.lval = -1;  
mul_function(&$2.u.constant, &$2.u.constant, &minus_one 
TSRMLS_CC);  $$ = $2; }
        |       T_ARRAY '(' static_array_pair_list ')' { $$ 
= $3; $$.u.constant.type = IS_CONSTANT_ARRAY; }
        |       parse_class_name_entry T_STRING { 
zend_do_fetch_constant(&$$, &$1, &$2, ZEND_CT TSRMLS_CC); }

This bug has been fixed in CVS. You can grab a snapshot of the
CVS version at http://snaps.php.net/. In case this was a documentation 
problem, the fix will show up soon at http://www.php.net/manual/.
In case this was a PHP.net website problem, the change will show
up on the PHP.net site and on the mirror sites.
Thank you for the report, and for helping us make PHP better.

Thanks for the bug report and fix.