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kotlinlang

actual-throws-warning.png

Another issue, this one caused by the 1.9.20-Beta Kotlin IDE plugin (232-1.9.20-Beta-release-242-IJ9559.62). Some `expect`/`actual` function calls annotated `@Throws` warn:
&gt; Annotation `@Throws(exceptionClasses = {&lt;SomeException&gt;::class})` is missing on actual declaration. All annotations from expect `fun &lt;someFunction&gt;() defined in ...` must be present with the same arguments on actual `fun &lt;someFunction&gt;() defined in ...`, otherwise they might behave incorrectly.
even though the `actual` is in fact annotated with the same exception class as the `expect`.

This seems to occur when the exception class is defined as an `actual typealias`, but not in source sets where the exception is an `actual class`. Everything works at compile/run time.

The warnings occur with either Kotlin 1.9.10 or 1.9.20-Beta, with the 1.9.20-Beta IDE plugin, but not with the 1.9.0 IDE plugin.

This is already fixed in <https://youtrack.jetbrains.com/issue/KTIJ-26700/KMP-false-positive-report-of-non-matching-expect-and-actual-annotations-if-annotation-is-actual-typealias|KTIJ-26700>. I'll do a cherry-pick today