Hey folks, I'm trying to log exception on iOS via ...

# multiplatform

[ivan.savytskyi]

Hey folks, I'm trying to log exception on iOS via throwable.stackTraceToString(). But calling this API crashes with ncorrectDereferenceException: Trying to access top level value not marked as @ThreadLocal or @SharedImmutable from non-main thread exception and from stack trace of crash on iOS looks like it happens inside Throwable:

#16	0x000000010fb50ffa in kfun:kotlin.Throwable.<init>$lambda-0#internal at /Users/teamcity/buildAgent/work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/Throwable.kt:33
#17	0x000000010fb511ef in kfun:kotlin.Throwable.$<init>$lambda-0$FUNCTION_REFERENCE$119.invoke#internal at /Users/teamcity/buildAgent/work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/Throwable.kt:32
#18	0x000000010fb7e907 in kfun:kotlin.native.concurrent.FreezeAwareLazyImpl.getOrInit#internal at /Users/teamcity/buildAgent/work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/native/concurrent/Lazy.kt:28
#19	0x000000010fb7f0b0 in kfun:kotlin.native.concurrent.FreezeAwareLazyImpl#<get-value>(){}1:0 at /Users/teamcity/buildAgent/work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/native/concurrent/Lazy.kt:55
#20	0x000000010fb4e975 in getValue [inlined] at /Users/teamcity/buildAgent/work/f01984a9f5203417/backend.native/build/stdlib/kotlin/util/Lazy.kt:44
#21	0x000000010fb4e93f in kfun:kotlin.Throwable.<get-stackTraceStrings>#internal at

Did anyone run into this as well?

Also just ran quick test by doing this val tmp = RuntimeException().getStackTrace() it crashes as well

[Benoît]

I've managed to get around this by freezing the Throwable before calling stackTraceToString()

[Benoît]

import kotlin.native.concurrent.freeze

If you are in commonMain, then you can always create an actual/expect for this freeze() function and just have one that does nothing for other targets

[ivan.savytskyi]

agh, thx for advice....going to check

[Benoît]

Let me know if that works 🙂

[ivan.savytskyi]

no, not working for me 😞

[Benoît]

Sorry then I don't know 😞

[ivan.savytskyi]

it's super weird that this fails: RuntimeException().freeze().printStackTrace()