Contract event returns error, if the contract doesn't exist.

[frozeman]

I get a contract (which doesn't exist, or i can't know if it exists) and want to watch for an event.

If have the following ABI:

{
        "name":"SingleTransact",
        "type":"event",
        "inputs":[
            {"indexed":true,"name":"out","type":"string32"},
            {"indexed":false,"name":"owner","type":"address"},
            {"indexed":false,"name":"value","type":"uint256"},
            {"indexed":false,"name":"to","type":"address"}
        ]
    }

And i watch for that event like:

var singleTxWatcher = contract.SingleTransact();
singleTxWatcher.changed(transactionCallback);

I get the following error: Uncaught TypeError: Cannot read property 'length' of undefined ethereum.js:1050

Which matches the following part in ejs:

var web3 = {
    _callbacks: {},
    _events: {},
    providers: {},

    toHex: function(str) {
        var hex = "";
        for(var i = 0; i < str.length; i++) {
            var n = str.charCodeAt(i).toString(16);
            hex += n.length < 2 ? '0' + n : n;
        }

        return hex;
    },
...