Collision Result GC Leading to Engine Crash in GodotJS

[zwa73]

Version

4.1-v0.0.20-20240906

System information

Windows11

Issue description

export default class TestScript extends godot.PhysicsBody2D {
    collink: any;

    _ready() {
        this.set_physics_process(true);  // Enable physics processing
    }

    _physics_process(delta: number): void {
        let velocity = new godot.Vector2();
        if (godot.Input.is_action_pressed("up")) velocity.y -= 1;
        if (godot.Input.is_action_pressed("down")) velocity.y += 1;
        if (godot.Input.is_action_pressed("left")) velocity.x -= 1;
        if (godot.Input.is_action_pressed("right")) velocity.x += 1;

        // Normalize velocity vector and scale by speed and delta time
        if (velocity.length() > 0) {
            velocity.x *= 5;
            velocity.y *= 5;

            // Update position and handle collisions
            // Without storing the collision result, the object is garbage collected (GC)
            // which leads to game crashes on subsequent collision checks
            const res = this.move_and_collide(velocity, false, 0.08, true);
            if (res) this.collink = res;  // Store collision result to prevent GC
            console.log('res', res);
        }
    }
}

Steps to reproduce

Just testing the above code

Minimal reproduction project (MRP)

game.zip

[Geequlim]

IMO this is an engine side bug.
res should be released after this scope or the memory will leak.