"Cannot perform 'getPrototypeOf' on a proxy that has been revoked" error in simple reducer sandbox example.

[laurence fass]

🐛 Bug Report

Ive created a very simple immer sandbox comparing immutable and mutable reducers by wrapping the mutable reducer (i.e. a reducer directly mutating state) in an immer produce function. The unwrapped (immutable) reducer works entirely correctly. The immer wrapped (mutable) reducer also updates state correctly but throws an error on attempting to execute console.log. I wrote this sandbox to prove a more complex example (too complex for a sanbox) causing a similar error, and I hope that fixing this will also fix my other issue.

TypeError: Cannot perform 'getPrototypeOf' on a proxy that has been revoked

This is the most basic reducer example I can think of so Im not sure whats going wrong, or if this is a bug.

Link to repro

https://codesandbox.io/s/react-typescript-forked-c2dc09

To Reproduce

Steps to reproduce the behavior:
run the code.
increment1 and note the console log works correctly
increment2 and note the repeated error

Observed behavior

see above

Expected behavior

console.log should work correctly inside the mutable reducer

Environment

We only accept bug reports against the latest Immer version.

• Immer version:
• [x ] I filed this report against the latest version of Immer
• [x ] Occurs with setUseProxies(true)
• Occurs with setUseProxies(false) (ES5 only)

[Michel Weststrate]

console.log is an async process that will read your draft only after the producer has already finished. So either copy / stringify the draft first, or print the result instead of the draft

…

On Wed, 13 Apr 2022, 12:52 laurence fass, ***@***.***> wrote: 🐛 Bug Report Ive created a very simple immer sandbox comparing immutable and mutable reducers by wrapping the mutable reducer (i.e. a reducer directly mutating state) in an immer produce function. The unwrapped (immutable) reducer works entirely correctly. The immer wrapped (mutable) reducer also updates state correctly but throws an error on attempting to execute console.log. TypeError: Cannot perform 'getPrototypeOf' on a proxy that has been revoked ```​ This is the most basic reducer example I can think of so Im not sure whats going wrong, or if this is a bug. ## Link to repro [https://codesandbox.io/s/react-typescript-forked-c2dc09](url) ## To Reproduce Steps to reproduce the behavior: run the code. increment1 and note the console log works correctly increment2 and note the repeated error ## Observed behavior see above ## Expected behavior console.log should work correctly inside the mutable reducer ## Environment We only accept bug reports against the latest Immer version. - **Immer version:** - [ ] I filed this report against the _latest_ version of Immer - [ ] Occurs with `setUseProxies(true)` - [ ] Occurs with `setUseProxies(false)` (ES5 only) — Reply to this email directly, view it on GitHub <#925>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAN4NBGGGGU252VDF5BUZADVE2YQTANCNFSM5TKNES5Q> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[laurence fass]

thanks for your time, that worked fine.