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Bug #80058 Unparenthesized `a ? b : c ? d : e` does not trigger own error handler
Submitted: 2020-09-04 10:34 UTC Modified: 2020-09-07 07:40 UTC
From: jochem dot blok at fasterforward dot nl Assigned:
Status: Wont fix Package: Unknown/Other Function
PHP Version: 7.4.10 OS: Ubuntu 20.04
Private report: No CVE-ID: None
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 [2020-09-04 10:34 UTC] jochem dot blok at fasterforward dot nl
Description:
------------
Error "Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)`" does not trigger own error handler. Callingerror_get_last() does return this error.

Test script:
---------------
function shutdown()
{
    $error = error_get_last();
    var_dump($error);
}

register_shutdown_function('shutdown');

function myErrorHandler($errno, $errstr, $errfile, $errline)
{
    echo "\n\n--------------- ERROR ---------------------\n\n";
    echo "\n".'errno = '; print_r($errno);
    echo "\n".'errstr = '; print_r($errstr);
    echo "\n".'errfile = '; print_r($errfile);
    echo "\n".'errline = '; print_r($errline);

    return true;
}

set_error_handler("myErrorHandler");


$a = 1;
$b = 2;
$c = 3;
$d = 4;
$e = 5;

echo $a ? $b : $c ? $d : $e;

parse_str ('wrweqr');

Expected result:
----------------
As you can see parse_str is handle by the own error handler. "echo $a ? $b : $c ? $d : $e;" should also be handled.

Actual result:
--------------
Only parse_str is handled.

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 [2020-09-04 10:38 UTC] nikic@php.net
-Status: Open +Status: Wont fix
 [2020-09-04 10:38 UTC] nikic@php.net
This is a compile-time error, that is triggered before your set_error_handler() call. To catch it, set_error_handler() needs to be called before the file is included.
 [2020-09-04 12:38 UTC] jochem dot blok at fasterforward dot nl
This is indeed the case when opcache is disbaled. BUT if you enable opcase the error is not handled by the error handler. Only by the shutdown handler.
 [2020-09-07 07:40 UTC] nikic@php.net
Yes, opcache disables custom error handlers during compilation. I also checked that the opcache.replay_warnings mode in PHP 8 doesn't affect this.

It looks like this opcache issue already has a bug report at bug #73665.
 
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