Sporadic "Bad type on operand stack" errors when running tests

[languitar]

With the most recent release, things mostly work fine. But it seems that there is some (gradle build?) cache invalidation issue. Sometimes, tests can only be executed after a gradle clean. Otherwise, we see exceptions like the following one:

Bad type on operand stack
Exception Details:
  Location:
    redacted/path/SomeClass$linkFunctionVariant$suspendImpl$$inlined$fixedQuery$1.invokeSuspend(Ldev/reformator/stacktracedecoroutinator/provider/DecoroutinatorSpec;Ljava/lang/Object;)Ljava/lang/Object; @16: getfield
  Reason:
    Type 'dev/reformator/stacktracedecoroutinator/provider/DecoroutinatorSpec' (current frame, stack[0]) is not assignable to 'redacted/path/SomeClass$someMethod$suspendImpl$$inlined$fixedQuery$1'
  Current Frame:
    bci: @16
    flags: { }
    locals: { 'dev/reformator/stacktracedecoroutinator/provider/DecoroutinatorSpec', 'java/lang/Object', '[Z' }
    stack: { 'dev/reformator/stacktracedecoroutinator/provider/DecoroutinatorSpec' }
  Bytecode:
    0000000: redacted...
  Stackmap Table:
    append_frame(@36,Object[#222])
    append_frame(@64,Integer)
    full_frame(@104,{Object[#124],Object[#90],Object[#222],Integer},{Object[#142],Object[#124],Object[#90]})
    full_frame(@115,{Object[#124],Object[#90],Object[#222],Integer},{Object[#142],Object[#124],Object[#90]})
    full_frame(@126,{Object[#124],Object[#90],Object[#222],Integer},{Object[#142],Object[#124],Object[#90]})
    same_locals_1_stack_item_frame(@136,Object[#90])
    same_frame(@155)
    same_frame(@162)
    full_frame(@192,{Object[#124],Object[#90],Object[#222],Integer},{Object[#124],Object[#90]})
    full_frame(@205,{Object[#124],Object[#90],Object[#222],Integer},{Object[#124],Object[#90]})
    same_locals_1_stack_item_frame(@215,Object[#90])
    full_frame(@221,{Object[#124],Object[#90],Object[#222],Integer},{Object[#124],Object[#90]})
    same_frame(@227)
    chop_frame(@256,1)

Sorry for not being able to provide all details here.

[Anamorphosee]

@languitar do you use Decoroutinator via Gradle plugin? And what’s your platform, JVM or Android?

[languitar]

Gradle Plugin targeting JVM

[Anamorphosee]

Thank you for the report. I’ll try to reproduce the issue on this week. By the way, for JVM it’s possible to install Decoroutinator at runtime without relaying on Gradle(ways 2 or 3 from https://github.com/Anamorphosee/stacktrace-decoroutinator?tab=readme-ov-file#jvm)

[languitar]

Thank you for the report. I’ll try to reproduce the issue on this week. By the way, for JVM it’s possible to install Decoroutinator at runtime without relaying on Gradle(ways 2 or 3 from https://github.com/Anamorphosee/stacktrace-decoroutinator?tab=readme-ov-file#jvm)

The documentation sounded like the Gradle plugin being the preferred way. Is that still true?

[Anamorphosee]

Dynamic agent (way 2) probably will be banned by Oracle in JDK 22. Otherwise it doesn’t matter how Decoroutinator is installed.

[Anamorphosee]

@languitar I tried but couldn't reproduce the issue. Maybe you can provide a sample project with the issue? Or at least provide all of your build configuration (Gradle version, applied Gradle plugins, JDK version, etc.) ?

[languitar]

Unfortunately, I can't share the project and I'm also unable to reproduce this in an isolated sample. I'll try to collect the build facts tomorrow when I'm back at work.

[languitar]

Sorry, I missed this one.

The errors only sporadically appear when running tests from within IntelliJ as far as I can tell.

Some interesting pointers that might be related:

• We use jacoco for coverage
• On my system, this happens with temurin 17 as the JDK
• Gradle version 8

Here's our plugin definition block:

plugins {
    application
    kotlin("jvm")
    kotlin("plugin.serialization")
    alias(libs.plugins.gradle.node)
    id("tech.cariad.arche.common-repositories")
    jacoco
    id("jacoco-report-aggregation")
    `jvm-test-suite`
    id("test-report-aggregation")
    alias(libs.plugins.detekt)
    alias(libs.plugins.openapi.generator)
    // Recover stack traces in exceptions thrown in Kotlin coroutines to see better stack traces.
    alias(libs.plugins.stacktracedecoroutinator)
}