RDT crashes page if store.subscribe is undefined

[philipwhiuk]

page.bundle.js:6 Uncaught TypeError: t.subscribe is not a function
    at I (page.bundle.js:6:6537)
    at page.bundle.js:6:6935
    at hk (main.jsx-4WfQJ2Z1.js:841:35810)
    at main.jsx-4WfQJ2Z1.js:841:65460

Source code:

redux-devtools/extension/src/pageScript/index.ts

Line 498 in 4b1d1d6

store.subscribe(handleChange);

Sample store definition from Chrome inspect:

{
   @@observable: ƒ [d]()
   dispatch: ƒ s(c)
   getState: ƒ i()
   liftedStore: ƒ ()
   replaceReducer: ƒ replaceReducer(c)
   [[Prototype]]: Object
}

I think this is because RDT now has a higher Redux version requirement. But it should gracefully fail rather than crash the whole page

[markerikson]

store.subscribe is the foundation of a Redux store and has existed since the first versions, so that part hasn't ever changed.

That sample store definition itself looks broken - it should have a subscribe method, and the fact that it appears to be an actual Redux store without a subscribe method means the store itself is actually wrong.

Where is this running? Can you provide a repro?