[PHP-BUG] Bug #51487 [NEW]: set_error_handler() misbehave under certain circumstancies

From:             
Operating system: All
PHP version:      5.3.2
Package:          Scripting Engine problem
Bug Type:         Bug
Bug description:set_error_handler() misbehave under certain circumstancies

Description:
------------
When throwing an exception from a custom error handler, PHP sometimes dies
with a non-obvious error as the actual problem is hidden.

To reproduce, create a simple set_error_handler() and throw an exception
(ErrorException here) whenever an error occur (with error_reporting set to
-1 for instance).

If you try to output a not-defined variable, you will see the Exception.
But, if you call a method on a not-defined variable, the exception is not
thrown, and an error message is displayed instead. Debugging is not trivial
as the real problem is masked.


Test script:
---------------
set_error_handler(function ($level, $message, $file, $line, $context)
{
  throw new \ErrorException($message);
});

// will throw an Exception (Undefined variable: foo)
// echo $foo;

// will not throw the exception, PHP will try to call bar() instead
$foo->bar();


Expected result:
----------------
PHP Fatal error:  Uncaught exception 'ErrorException' with message
'Undefined variable: foo' in ..:..

Actual result:
--------------
PHP Fatal error:  Call to a member function bar() on a non-object in ... on
line 0

-- 
Edit bug report at http://bugs.php.net/bug.php?id=51487&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=51487&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=51487&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=51487&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=51487&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51487&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=51487&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=51487&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=51487&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=51487&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=51487&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=51487&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=51487&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=51487&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=51487&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51487&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51487&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=51487&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=51487&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=51487&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=51487&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=51487&r=mysqlcfg