I have the weirdest bug (maybe in my project, or i...

# intellij

[loke]

I have the weirdest bug (maybe in my project, or in IDEA, or in Kotlin). It's a multiplatform Kotlin project which loads and builds fine in IDEA with Kotlin 2.0.0-RC3. However, if I switch to Kotlin 2.0.0, then all Kotlin library classes in the "common" directory (such as ArrayList, or IllegalStateException, etc) will be red with the IDE saying that the class cannot be found. The same standard library classes references in the platform-specific directories (such as "jvm" and "linux") works fine.

If I switch back to Kotlin 2.0.0-RC3, the problem goes away.

The really weird thing is that this is what happens when I load the project on a new system (or after clearing the IDEA cache). I have two machines where this problem didn't occur. So I deleted the cache and config on it and reloaded the project and now it also exhibits this problem. This suggests to me that this is a problem with IDEA. But, I will never rule out operator error.

The project where this happens in open source by the way, so if anyone wants to test, they can find the code here: https://codeberg.org/loke/array

Any idea how to figure this one out?

[CLOVIS]

Do you use Dokkatoo?

[loke]

No, I don't think so. I don't know what it is (searching) ah, it's a document generator. No, I don't use that.

[CLOVIS]

I don't know what it is then 😕

If you can reproduce it on a smaller project, please create an issue: https://kotl.in/issue

[loke]

This is what I see when I switch to Kotlin 2.0.0 (without RC3):

[loke]

@CLOVIS thanks. I've been trying to narrow it down, but so far have been unsuccessful. I'll try to make a smaller project of course, but it's a lot of work so I'm considering waiting until 2.0.1 and if the issue remains, then I can try again.

[CLOVIS]

You're the first one I see having this kind of issues, so I don't think it's a known issue 😕

[loke]

The machines I tried this one were all Fedora 40 machines. The Fedora 39 machine still loads the project perfectly (although, I haven't cleared the configuration or cache on that one yet 🙂 ).

[loke]

And... It's getting stranger and stranger. I wondered if the problem was fixed by a change in Kotlin versions, so I changed the code to use RC3, then cleared all caches and generated IDEA files and reloaded. Now I had the error (lots of red in my files). I then changed to 2.0.0, and the problem remained. I then changed to RC2, and the problem still remained.

[loke]

I will now try again, starting with "2.0.0", clear everything and downgrade to RC3 to see if the original described behaviour returns.

[loke]

This is really strange. I can't get it working in any way anymore, no matter what Kotlin version I try. If anyone is able to try to load the project on their system I'd really appreciate it.

[CLOVIS]

If you suspect it's a system-dependent thing, try to run your project in a container made for CI, for example mine: <http://registry.gitlab.com/opensavvy/automation/containers/java|registry.gitlab.com/opensavvy/automation/containers/java> (sources)

It can build and run projects for jvm() and linuxX64() (there are other containers in the repo for js(IR) if you need)

[loke]

@CLOVIS The project itself builds and runs correctly. It's only when it's loaded into IDEA thew error occurs.

[loke]

I'm going to try in a virtual machine running Fedora 39 next.