### Godot version

4.0.dev (c309de53997feff3286295fb2d71657f112a15db)

### System information

Linux, Nvidia, Vulkan

### Issue description

Editor segfaults when certain conditions are met when using the AnimationPlayer editor.

### Steps to reproduce

1. Create multiple animations, saved into a animation collection
2. Open an existing animation, then make a new empty animation
3. Change from seconds to fps, or add a new property to animate ()
4. Editor crashes

NOTE: It is slightly random and I have not found a perfect repro

### Minimal reproduction project

N/A (TBD?)
return true;
			}
		} break;
		case Animation::TYPE_METHOD: {
			Dictionary d = animation->track_get_key_value(track, key);
			if (name == "name") {
				ERR_FAIL_COND_V(!d.has("method"), false);
				r_ret = d["method"];
				return true;
			}
			ERR_FAIL_COND_V(!d.has("args"), false);
			Vector<Variant> args = d["args"];
			if (name == "arg_count") {
				r_ret = args.size();
				return true;
			}
			if (name.begins_with("args/")) {
				int idx = name.get_slice("/", 1).to_int();
				ERR_FAIL_INDEX_V(idx, args.size(), false);
				String what = name.get_slice("/", 2);
				if (what == "type") {
					r_ret = args[idx].get_type();
					return true;
				}
				if (what == "value") {
					r_ret = args[idx];
					return true;
				}
			}
		} break;