Description:
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When I load a simplexml object into a session var. after doing session_start() the rest of the page completes, but next time load the page and it does session_start() in the same browser session, I get a warning:
Warning: session_start() [function.session-start]: Node no longer exists in ... on line 46
Line 46: session_start()

I found out that the problem only happens when i do this:
$_SESSION['orderprice'] = $rtn->products->product[0]['price'];

var_dump($rtn->products->product[0]['price']) prints:
object(SimpleXMLElement)#11 (1) { [0]=> string(3) "0.5" } 

If i do:
$_SESSION['orderprice'] = (string)$rtn->products->product[0]['price'];

There is no problem at all.
First php bug report, bear with me please.

Reproduce code:
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session_start();
$_SESSION['orderprice'] = $rtn->products->product[0]['price'];

yelds warning in session_start()

if i do:
session_start();
$_SESSION['orderprice'] = (string)$rtn->products->product[0]['price'];

there is no problem.