ReScript v12 - lambda breaks code casted by Obj.magic

[DZakh]

https://rescript-lang.org/try?version=v12.0.0-alpha.10&module=esmodule&code=DYUwLgBAZgdhC8EAUBDATgcwDQQH4HsAHMAS3xgGcIUqB9eAfgEoEA+CAbwCgIIBSNCgDuSAAYBjchXygAdMHwZRTVJiZcAvly6hIhAK4AjYCXEAxGAC4IAchRtb9xLAC0rAPKGAVrIC2KDFNtXQhaBAgDY1MLJAAiKHx8WPUgA

Expected:
https://rescript-lang.org/try?version=v11.1.4&module=esmodule&code=DYUwLgBAZgdhC8EAUBDATgcwDQQH4HsAHMAS3xgGcIUqB9eAfgEoEA+CAbwCgIIBSNCgDuSAAYBjchXygAdMHwZRTVJiZcAvly6hIhAK4AjYCXEAxGAC4IAchRtb9xLAC0rAPKGAVrIC2KDFNtXQhaBAgDY1MLJAAiKHx8WPUgA

Or it turns it into something like this let schema = param => S.option(S.string, param); instead of this let schema = S.option(S.string) when called outside of the module.

[DZakh]

Reproduction:

1. Clone Sury repo
2. Checkout to branch https://github.com/DZakh/sury/tree/dz/sury-v10-rescript-v12
3. Install dependencies pnpm i
4. Run compiler pnpm res & tests pnpm test:res
5. See in S_option_test.res.mjs broken schema creation

[cristianoc]

Seems a duplicate of an existing issue that was closed as unclear how to fix. Can't find it right now: @cknitt ?

[cknitt]

#7023

[cristianoc]

closing this as unclear how to address: see #7023