Method run_unraisable

crates/vm/src/vm/mod.rs:1114–1139

(&self, e: PyBaseExceptionRef, msg: Option<String>, object: PyObjectRef)

    #[cold]
    pub fn run_unraisable(&self, e: PyBaseExceptionRef, msg: Option<String>, object: PyObjectRef) {
        // During interpreter finalization, sys.unraisablehook may not be available,
        // but we still need to report exceptions (especially from atexit callbacks).
        // Write directly to stderr like PyErr_FormatUnraisable.
        if self.state.finalizing.load(Ordering::Acquire) {
            self.write_unraisable_to_stderr(&e, msg.as_deref(), &object);
            return;
        }

        let sys_module = self.import("sys", 0).unwrap();
        let unraisablehook = sys_module.get_attr("unraisablehook", self).unwrap();

        let exc_type = e.class().to_owned();
        let exc_traceback = e.__traceback__().to_pyobject(self); // TODO: actual traceback
        let exc_value = e.into();
        let args = stdlib::sys::UnraisableHookArgsData {
            exc_type,
            exc_value,
            exc_traceback,
            err_msg: self.new_pyobj(msg),
            object,
        };
        if let Err(e) = unraisablehook.call((args,), self) {
            println!("{}", e.as_object().repr(self).unwrap());
        }
    }

    /// Write unraisable exception to stderr during finalization.
    /// Similar to _PyErr_WriteUnraisableDefaultHook in CPython.