Hello, World! What can you do when you get this k...

# compiler

[bod]

Hello, World!

What can you do when you get this kind of errors:

> Task :app:compileDebugKotlin
e: org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: wrong bytecode generated

?

[bod]

A bit more details:

The root cause java.lang.AssertionError was thrown at: org.jetbrains.kotlin.codegen.coroutines.RefinedIntTypesAnalysisKt.performRefinedTypeAnalysis(refinedIntTypesAnalysis.kt:142)
        at org.jetbrains.kotlin.codegen.TransformationMethodVisitor.visitEnd(TransformationMethodVisitor.kt:92)
        at org.jetbrains.kotlin.codegen.FunctionCodegen.endVisit(FunctionCodegen.java:929)
        ... 49 more
Caused by: java.lang.AssertionError: int type expected, but null was found in basic frames
        at org.jetbrains.kotlin.codegen.coroutines.RefinedIntTypesAnalysisKt.performRefinedTypeAnalysis(refinedIntTypesAnalysis.kt:142)
        at org.jetbrains.kotlin.codegen.coroutines.CoroutineTransformerMethodVisitor.spillVariables(CoroutineTransformerMethodVisitor.kt:607)
        at org.jetbrains.kotlin.codegen.coroutines.CoroutineTransformerMethodVisitor.performTransformations(CoroutineTransformerMethodVisitor.kt:145)
        at org.jetbrains.kotlin.codegen.TransformationMethodVisitor.visitEnd(TransformationMethodVisitor.kt:70)
        ... 50 more

[wasyl]

Ideally find the offending code and file a bug

[bod]

for now I couldn't find it

[bod]

going to have to go revert little by little I guess...

[wasyl]

You can try a clean build first (--rerun-tasks) to make sure it’s not caching issue

[bod]

ah! 🙂 I'll try

[bod]

same 😢

[bod]

if I remove one particular parameter from my method, it works again. But I need to pass this parameter!

[wasyl]

Is it special somehow? Since this is a bug I would try some differently looking but similar solutions: changing order of parameters, making the function non-inline, etc.

[wasyl]

Most obvious backend exceptions should’ve been found by now so you’re likely doing something rare, which means there’s a chance of doing it another way 😛

[bod]

my method is pretty "normal" though:

suspend fun getBeneficiaries(
        organizationId: String,
        bankAccountId: String?,
        nextPageToLoad: Int,
        perPage: Int?,
        hidden: Boolean,
        sortBy: String
    )

[bod]

I tried changing the order of the parameters indeed 🙂 to no avail. If I remove bankAccountId: String? it does work.

[wasyl]

I suppose it’s something about its usage in the body, then. Ideally you’d find whatever causes it directly (e.g. passing this nullable parameter to an inline function called in a specific fashion)

[wasyl]

and in the meantime you can maybe change parameter type to String and pass some marker value (empty string, "!!empty!!" or something similar) and doing takeIf in the function body?

[bod]

I'll try

[bod]

nope, same problem if it's non null

[wasyl]

Then I’d focus on wherever you’re passing nullable parameter

[bod]

made it to work by removing hidden and sortBy which, luckily I didn't really need!

[bod]

thanks a lot for your help

[wasyl]

You’re welcome 🙂 I still encourage you to file an issue, as you did hit a bug

[wasyl]

Probably something with sortedBy being an inline function with a crossinline selector, in which you’ve been capturing hidden param

[bod]

no I swear the calling site was very basic too:

remoteSource
                    .getBeneficiaries(
                        organizationId = membershipRepository.currentOrganization.id,
                        bankAccountId = if (shouldPassBankAccountIdToBeneficiariesCall()) transferCreationViewModel.bankAccountId else null,
                        nextPageToLoad = nextPageToLoad,
                        perPage = perPage,
                        hidden = false,
                        sortBy = "name:asc"
                    )

[bod]

it's going to be hard to open a ticket though because I suppose this needs the whole codebase to repro - which is not open source 😞

[wasyl]

yeah I imagine. Just for clarity, by call site I meant line where you were calling sortedBy with the captured hidden parameter

[bod]

sorry I don't understand 🙂 sortedBy is just a String parameter to which I pass a constant. Same for hidden, just a Boolean parameter, to which I pass false.

[wasyl]

ahhh I thought you were calling sortedBy function on some collection 😄 Didn’t notice that the parameter has the same name, sorry for confusion

[wasyl]

Well, I’d still encourage you to file the bug with the stacktrace at least, perhaps Kotlin folks will be able to figure out something without clear repro

[bod]

all right no worries and thanks again! I'll try to find a few moments to do it.