## Compiler version 3.3.0 ## Minimized code ```scala sealed trait Op object Op { case object `==` extends Op } def `is_==`(a: Op): true = { a match { case Op.`==` => true // won't compile } } ``` Note other operators like `+`, `-` works just fine. ## Output ``` Stable identifier required, but Playground.Op.== found ``` ## Expectation Should compile fine. ## Workaround Bind it to a constant