Re: Obscure error in FF20

On 4/12/13 6:49 AM, Arnaud Didry wrote:
> We are experiencing random and obscure errors since the FF20 update : "TypeError: Value does not implement interface Element".

That's certainly the error you'd get if something that's not an element 
has an element method called on it...

> The stack trace always point to the same line of code : `if (node.id && !node.id.tagName && !node.id.item) {id = node.id;}` (from YUI3 [1]). The caller also ensure that `node.nodeType === 1` [2]

That's quite odd, for sure!

Are you able to log any information about this when it fails?  Knowing 
node.localName would really help.

> We're still trying to find a way to produce a failing test case. We deployed a patch which wrap the line in a try/catch to log the `node` variable but since then the error doesn't seems to occur anymore.

_That_ indicates some sort of JIT bug to me, unfortunately.  :(  I guess 
that answers my question about logging...

What if you put the try/catch higher up the callstack?

> Should I file a ticket on bugzilla ?

Please, with whatever information you have!

-Boris