useAtom(undefined) throws Invalid value used as weak map key

[kevinschaich]

This should be checked for or caught and re-thrown as a more helpful error message.

To Repro:

const value = useAtom(undefined)

    -> TypeError: Invalid value used as weak map key

I hit this today and if it weren't for this comment I would have been very struggling for a few hours:
#1816 (reply in thread)

One potentially common way people might hit this is if they use nested/split atoms and try to reference a key that doesn't exist.

e.g. objects:

const objectAtom = atom({
    a: atom(...)
    b: atom(...)
)

...

const bValue = useAtomValue(useAtomValue(objectAtom)[c])

e.g. lists:

const listAtom = atom([atom(...), atom(...)]

...

const thirdValue = useAtomValue(useAtomValue(listAtom)[2])

Related: #2272, #1817, #1177, #1816, #2239, #2273

[kevinschaich]

cc: @dai-shi I believe you replied to a few of the issues/discussions above.