Object values of a `Map` are not frozen anymore

[alexlazau]

🐛 Bug Report

Starting with Immer 10.0.4, enableMapSet() does not seem to work as expected as values (if objects) of a native Map aren't frozen anymore.

Link to repro

https://stackblitz.com/edit/immer-10-0-4-map-bug

To Reproduce

Create a Map with objects by using produce and check the values of the Map with Object.isFrozen(...).

Observed behavior

Objects inside a Map are not frozen.

Expected behavior

Objects inside a Map are frozen. The provided repo works if the Immer version is set to 10.0.3.

Environment

• Immer version: 10.0.4
• I filed this report against the latest version of Immer

[mweststrate]

Note to self, see also #1069

[mweststrate]

Thanks for the detailed report, will investigate at a later point.