Method write_unraisable_to_stderr

crates/vm/src/vm/mod.rs:1143–1187

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

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

    /// Write unraisable exception to stderr during finalization.
    /// Similar to _PyErr_WriteUnraisableDefaultHook in CPython.
    fn write_unraisable_to_stderr(
        &self,
        e: &PyBaseExceptionRef,
        msg: Option<&str>,
        object: &PyObjectRef,
    ) {
        // Get stderr once and reuse it
        let stderr = crate::stdlib::sys::get_stderr(self).ok();

        let write_to_stderr = |s: &str, stderr: &Option<PyObjectRef>, vm: &VirtualMachine| {
            if let Some(stderr) = stderr {
                let _ = vm.call_method(stderr, "write", (s.to_owned(),));
            } else {
                eprint!("{}", s);
            }
        };

        let msg_str = if let Some(msg) = msg {
            format!("{msg}: ")
        } else {
            "Exception ignored in: ".to_owned()
        };
        write_to_stderr(&msg_str, &stderr, self);

        let repr_result = object.repr(self);
        let repr_wtf8 = repr_result
            .as_ref()
            .map_or("<object repr failed>".as_ref(), |s| s.as_wtf8());
        write_to_stderr(&format!("{repr_wtf8}\n"), &stderr, self);

        // Write exception type and message
        let exc_type_name = e.class().name();
        let msg = match e.as_object().str(self) {
            Ok(exc_str) if !exc_str.as_wtf8().is_empty() => {
                format!("{}: {}\n", exc_type_name, exc_str.as_wtf8())
            }
            _ => format!("{}\n", exc_type_name),
        };
        write_to_stderr(&msg, &stderr, self);

        // Flush stderr to ensure output is visible
        if let Some(ref stderr) = stderr {
            let _ = self.call_method(stderr, "flush", ());
        }
    }

    #[inline(always)]
    pub fn run_frame(&self, frame: FrameRef) -> PyResult {