If a Kotlin exceptions is thrown out of a native code in ObjCExport
(when calling Swift/Obj-C method overriding Kotlin method, or calling
Swift/Obj-C block as Kotlin function type), treat this exception as
fatal and terminate the process.
This could happen if the Kotlin exception leaked from Kotlin to native
code before.
In other words, when calling Kotlin -> Swift/Obj-C -> Kotlin, if Kotlin
exception passes from the last to the first part, terminate.
^KT-50830
Add a test that checks that Kotlin Continuation wrapping Objective-C
completion handler has strong reference to it, i.e. completion handler
doesn't get reclaimed too early.
Follow-up to 4dcfd38.
With `unitSuspendFunctionObjCExport=proper` binary option,
for Unit-returning suspend functions ObjCExport now generates
completion handlers without redundant `KotlinUnit*` result parameter.
So Swift (5.5+) can import these functions as Void-returning async
functions.
^KT-47399 Fixed
Svyatoslav Scherbina