Kotlin 2.4.20-Beta2 introduces support for coroutine stack trace recovery, with the addition of the StackTraceRecoverable interface to the standard library. This feature, currently experimental, improves integration with the kotlinx.coroutines library because it allows developers to create new exception instances for stack trace recovery without adding a dependency on kotlinx.coroutines, according to JetBrains. Stack trace recovery helps with debugging when one coroutine throws an exception, and another rethrows it. It lets developers see where the exception originates and where another coroutine rethrows it.
Also experimental are four new functions that check collection elements for equality and uniqueness. The functions .allDistinct(), .allDistinctBy(), .allEqual(), and .allEqualBy() can be used on collections, sequences, and arrays, and compare elements using structural equality like other collection operations. Until these functions arrived in Kotlin 2.4.20-Beta2, checking whether collection elements were all distinct or all equal required using inefficient code patterns, JetBrains said.
And Kotlin 2.4.20-Beta2 features the first release of the Kotlin compiler native image. The native image offers a drop-in replacement for the standard kotlinc command-line tool, while offering faster startup time and higher performance, JetBrains said. This feature is also experimental.
