Bug #51463 [Csd]: ErrorException thrown from error_handler not catchable in exception handler

Edit report at http://bugs.php.net/bug.php?id=51463&edit=1

 ID:               51463
 User updated by:  tyra3l at gmail dot com
 Reported by:      tyra3l at gmail dot com
 Summary:          ErrorException thrown from error_handler not catchable
                   in exception handler
 Status:           Closed
 Type:             Bug
 Package:          Scripting Engine problem
 Operating System: Windows Xp Sp3, Debian Lenny
 PHP Version:      5.3.2

 New Comment:

But the exception handler should be called after the error handler and
before accessing the empty property which gives the fatal error, isn't
it?

I mean at first the interpreter tries to access the variable named $foo,
then generates a E_NOTICE which is trapped by the error handler, which
trows an Exception which never catched at all.


Previous Comments:
------------------------------------------------------------------------
[2010-04-02 13:35:54] tyra3l at gmail dot com

shit, my mistake, $foo will be empty, so $this->$foo will be generating
a fatal error, but before that, generate a warning about $foo is empty.
:/

------------------------------------------------------------------------
[2010-04-02 13:33:40] tyra3l at gmail dot com

On Lenny I was testing with the dotdeb.org 5.3.2 deb, on windows this is
the TS VC9 build

------------------------------------------------------------------------
[2010-04-02 13:29:49] tyra3l at gmail dot com

Description:
------------
It seems that there are some cases, when you can't catch Exceptions with
exception_handler which was thrown from error_handler for some errors.

For example if you do this:

$class = new StdClass;
echo $class->$foo;
error_handler gets called, ErrorException was thrown, but the Exception
wasn't catched with the exception_handler.

if you try 
echo $foo;
instead of
echo $class->$foo;
then the "same" error gets called with the error handler (by same error,
I mean same parameters), but the Exception thrown in this case is
successfuly catched by the exception handler.

Test script:
---------------
<?php

error_reporting(E_ALL);
ini_set('display_errors', 0);

function debug($s){
	echo "<pre>";
	var_dump($s);
	echo "</pre>";
}

set_error_handler(
	function ($errno, $errstr, $errfile, $errline ) {
		debug('error_handler');
		debug(array(
			'errno'		=>	$errno,
			'errstr'	=>	$errstr,
			'errfile'	=>	$errfile,
			'errline'	=>	$errline,
		));
		throw new ErrorException($errstr, 0, $errno, $errfile, $errline);
	}
);

set_exception_handler(
	function(Exception $e){
		debug('exception_handler');
		debug($e);
	}
);

$class = new StdClass;
echo $class->$foo;

echo 'done';

Expected result:
----------------
string(13) "error_handler"

array(4) {
  ["errno"]=>
  int(8)
  ["errstr"]=>
  string(23) "Undefined variable: foo"
  ["errfile"]=>
  string(55) "C:\work\xampp_vc9\htdocs\default\bug\error_handling.php"
  ["errline"]=>
  int(46)
}

string(17) "exception_handler"

object(ErrorException)#4 (8) {
  ["message":protected]=>
  string(23) "Undefined variable: foo"
...

Actual result:
--------------
string(13) "error_handler"

array(4) {
  ["errno"]=>
  int(8)
  ["errstr"]=>
  string(23) "Undefined variable: foo"
  ["errfile"]=>
  string(55) "C:\work\xampp_vc9\htdocs\default\bug\error_handling.php"
  ["errline"]=>
  int(46)
}



------------------------------------------------------------------------



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Edit this bug report at http://bugs.php.net/bug.php?id=51463&edit=1