Description:
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When a MySQLi resource is created, a fatal error or exception (possibly others) will result in the script terminating but MySQL's SHOW PROCESSLIST; will report a "Reading from net" state indefinitely for as many connections as were created before script termination.  These connections will be accumulated until MySQL fails with too many connections.

This only occurs when PHP is running as an Apache module, it does not occur when PHP is running from the command line.  Also, this does not occur with the MySQL PHP functions, only MySQLi.

I have tested this on:

FreeBSD 6.1, PHP 5.1.4, Apache 2.0.58, MySQL 4.0.19
Gentoo, PHP 5.1.4, Apache 2.2.0, MySQL 4.0.19

Reproduce code:
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<?php

$dbh = mysqli_connect($any, $valid, $params, $work);

some_undefined_function_resulting_in_error();

?>

Expected result:
----------------
A fatal error, telling me that I made a call to an undefined function.  I expect no residual MySQLi connections.

Actual result:
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A fatal error, telling me that I made a call to an undefined function.  However, I still have a residual MySQLi connection, as reported by MySQL's SHOW PROCESSLIST;