HMR Error: "Cannot set properties of undefined" despite hot reload working

[q3156277562]

I have two modules: common and layout. The layout module imports and uses a utility class (e.g., from ./src/utils/performance.ts) from the common module.

A separate service (or application) then imports and uses both of these modules together. When Hot Module Replacement (HMR) is triggered, it throws the following error:
commonModule.js:180892 Uncaught TypeError: Cannot set properties of undefined (setting './src/utils/performance.ts')

The peculiar thing is that despite this error, the hot-reloaded code is actually applied and works correctly.

Originally posted by @q3156277562 in module-federation/module-federation-examples#4373

[q3156277562]

I believe the issue occurs when loading the xxxx.hot-update.js file. When I forcibly block this file, the error disappears—but this is obviously not a perfect solution.

[ScriptedAlchemy]

Is the hosts remote entry loaded on the page by someone?

[q3156277562]

Is the hosts remote entry loaded on the page by someone?

My sincerest apologies for the delayed response. However, this issue appears to be quite peculiar—even when using just one consumer and one producer, the same problem still occurs, and the consumer does not export anything in Module Federation. Initially, I also thought this might be the cause of the bug, but after extensive troubleshooting, I realized it actually wasn’t. Moreover, this issue cannot be reproduced at the moment with other consumer modules that use the same producer module. I will try to see if I can provide a simple reproduction case.

By the way, the reason I believe the issue lies in Module Federation is that HMR works fine internally within a module itself. The problem only arises when modifying the producer's code and then manifesting on the consumer's end.

[q3156277562]

Is the hosts remote entry loaded on the page by someone?

In fact, the code runs successfully, but this error message inexplicably appears.

[q3156277562]

Is the hosts remote entry loaded on the page by someone?

I'm very sorry, but this issue is extremely difficult to reproduce with a simple demo. In the end, my solution was to simply block the hot-update files.