Previously, I was able to write and test Clarity 2 contracts using Clarinet without issues. However, with 1.2.0, there's been a regression. When running a test that calls a Clarity 2 function, you get the error:

Unchecked(CostComputationFailed("Error evaluating result of cost function ST000000000000000000002AMW42H.costs.cost_slice: Unchecked(UndefinedFunction(\"cost_slice\"))"))

Not just for slice?, but for all Clarity 2 functions.

I have a demo project that reproduces this: https://github.com/hstove/clarinet-repro-cost-bug

Run clarinet test tests/tester_test.ts to repro