regression: v6 no longer handles singletons with value `undefined`

[simhnna]

This code works without errors using inversify 5.1 but fails in inversify 6

import { Container } from "inversify";

const container = new Container();
const s = Symbol('foo');
container.bind(s).toConstantValue(undefined);

console.log(container.get(s));

container.unbindAll();

produces:

/project/node_modules/inversify/lib/container/container.js:453
        var constructor = Object.getPrototypeOf(instance).constructor;
                                 ^

TypeError: Cannot convert undefined or null to object
    at Function.getPrototypeOf (<anonymous>)
    at Container._deactivate (/project/node_modules/inversify/lib/container/container.js:453:34)
    at Container._deactivateIfSingleton (/project/node_modules/inversify/lib/container/container.js:634:21)
    at Container._deactivateSingletons (/project/node_modules/inversify/lib/container/container.js:639:31)
    at /project/node_modules/inversify/lib/container/container.js:287:19
    at /project/node_modules/inversify/lib/container/lookup.js:113:13
    at Map.forEach (<anonymous>)
    at Lookup.traverse (/project/node_modules/inversify/lib/container/lookup.js:112:19)
    at Container.unbindAll (/project/node_modules/inversify/lib/container/container.js:286:33)
    at file:///project/inversify-bug.mjs:10:11

[simhnna]

Actually primitive types apparently also cause issues. Using a number instead of undefined results in the following stacktrace

/project/node_modules/inversify/lib/container/container.js:467
            throw new Error(ERROR_MSGS.ON_DEACTIVATION_ERROR(constructor.name, ex.message));
                  ^

Error: onDeactivation() error in class Number: Reflect.hasMetadata is not a function
    at Container._deactivate (/project/node_modules/inversify/lib/container/container.js:467:19)
    at Container._deactivateIfSingleton (/project/node_modules/inversify/lib/container/container.js:634:21)
    at Container._deactivateSingletons (/project/node_modules/inversify/lib/container/container.js:639:31)
    at /project/node_modules/inversify/lib/container/container.js:287:19
    at /project/node_modules/inversify/lib/container/lookup.js:113:13
    at Map.forEach (<anonymous>)
    at Lookup.traverse (/project/node_modules/inversify/lib/container/lookup.js:112:19)
    at Container.unbindAll (/project/node_modules/inversify/lib/container/container.js:286:33)
    at file:///project/inversify-bug.mjs:10:11
    at ModuleJob.run (node:internal/modules/esm/module_job:193:25)

[simhnna]

I'm happy to contribute to make this work again if it's intended to work with primitive types. If it's not it would be nice to state that somewhere

[PodaruDragos]

yes please, PR welcome

[Jameskmonger]

Added to milestone 6.0.3, we will aim to resolve this regression as a priority. cc @PodaruDragos