Infinte loop occur in REPL

[GreasySlug]

Describe the bug

When any input is made in REPL mode, an infinite loop is occurred.

Reproducible code

cargo run
Starting the REPL server...
Connecting to the REPL server...
Erg interpreter 0.5.0-beta.0 (tags/?:5c5ea55, 2022/09/22 17:15:05.16) on x86_64/windows
>>> a # infinite loop occur

Additional context

I have already identified the location of the cause and the following code is the culprit.

erg/src/dummy.rs

Lines 104 to 107 in b56236a

	fn eval(&mut self, src: String) -> Result<String, EvalErrors> {
	self.compiler.cfg.input = Input::Str(src);
	self.compiler.compile_and_dump_as_pyc("o.pyc", "eval")?;
	let mut res = match self.stream.as_mut().unwrap().write("load".as_bytes()) {

Without avoiding the assignment of Input::Str(src) to self.compiler.cfg.input, this will result in an infinite loop.