Backwards compatibility issue with Mixin 0.8.7's constructor descriptor targeting fix

[KingContaria]

Hi,
before updating to fabricloader 0.16.0 i had to use slices to target different constructors of the same type.
While simply removing the slices and bumping loader dependency works, it seems the backwards compatibility has some issue:
Updating only the fabricloader in gradle.properties (and not bumping dependency) resulted in a crash when using the slices that previously worked in loader 0.15.7.

Old Mixin with Slices: https://github.com/KingContaria/StandardSettings/blob/c274c8688943200761c9634cb862dd6995239e35/src/main/java/me/contaria/standardsettings/mixin/fix/GameOptionsMixin.java

• works on 0.15.7
• crashes on 0.16.0, with dependency "fabricloader": ">=0.15.0"

Crash Stacktrace