problem with invert operator expression

[jggatc]

Expression with invert operator of an class instance causes error.

Error occurs with iobj = ~(obj) expression.
Browser error: Uncaught TypeError: Function.prototype.toString called on incompatible object.
Worked properly with iobj = obj.__invert__() expression.

python code:

class Obj:
    def __init__(self, x):
        self.x = x
    def __invert__(self):
        return ~self.x

# __pragma__ ('opov')
def op_invert():
    obj = Obj(42)
    if False:
        iobj = ~(obj)
# __pragma__ ('noopov')

op_invert()

compiled javascript code with ~(obj):

export var op_invert = function () {
	var obj = __call__ (Obj, null, 10);
	var iobj = ~(obj);
};

compiled javascript code with obj.__invert__():

export var op_invert = function () {
	var obj = __call__ (Obj, null, 10);
	var iobj = (function () {
		var __accu0__ = obj;
		return __call__ (__accu0__.__invert__, __accu0__);
	}) ();
};

env: Python3.9 venv with pip install Transcrypt
testing: Firefox version 133 in Linux