nested functions cause failure

[ghissues]

nested functions cause script failure on line 1058 of jsparser3.py :
while (operators and opPrecedence.get(operators[-1].type_) > opPrecedence[NEW]):

easily repeatable, here's the js file i created to get the error message below :

//fakejs.js
function isnumber(numb) {
return !isNaN(parseFloat(numb) && isFinite(numb)
}

error message :

./jsparser3.py ../fakejs.js
Traceback (most recent call last):
File "./jsparser3.py", line 1146, in
print(str(parse(open(sys.argv[1]).read(),sys.argv[1])))
File "./jsparser3.py", line 1140, in parse
n = Script(t, x)
File "./jsparser3.py", line 363, in Script
n = Statements(t, x)
File "./jsparser3.py", line 474, in Statements
n.append(Statement(t, x))
File "./jsparser3.py", line 498, in Statement
return FunctionDefinition(t, x, True, type_)
File "./jsparser3.py", line 757, in FunctionDefinition
f.body = Script(t, x2)
File "./jsparser3.py", line 363, in Script
n = Statements(t, x)
File "./jsparser3.py", line 474, in Statements
n.append(Statement(t, x))
File "./jsparser3.py", line 682, in Statement
n.value = Expression(t, x)
File "./jsparser3.py", line 1058, in Expression
opPrecedence[NEW]):
TypeError: unorderable types: NoneType() > int()