IntelliJ is doing invalid highlighting of Kotlin e...

# intellij

[napperley]

IntelliJ is doing invalid highlighting of Kotlin errors all over the place. Invalidating the cache and restarting the IDE doesn't resolve the issue ☹️ . Invalid highlighting even appears on lines where the Kotlin standard library is used.

[orangy]

What is the error?

[napperley]

Seems to be related to this issue: https://intellij-support.jetbrains.com/hc/en-us/community/posts/206916485-IntelliJ-highlights-errors-that-don-t-exist

[orangy]

Well, unlikely related to 2011 issue 🙂

[orangy]

So, what’s the error?

[napperley]

Red squiggles appear in places where they shouldn't be. The project compiles without any issues.

[orangy]

That I get, but what is an error red squiggle indicate? You can hover on it to see the message.

[louiscad]

Is Kotlin properly configured for the module? Is the gradle project "imported"/synced into the IDE?

[napperley]

The TODO error for instance is about "Overload resolution ambiguity" which highlights this line:

TODO("not implemented") //To change body of created functions use File | Settings | File Templates.

[orangy]

The error message is there for a reason, it should normally show what compiler considered and why can’t it choose. Can you provide the exact error message it shows?

[napperley]

One of the error messages from the invalid Kotlin error highlighting in IntelliJ.

[orangy]

Is it a multiplatform project? yes, it is because actual

[orangy]

Looks like dependencies are mixed up for JS

[orangy]

@bashor please take a look

[napperley]

There are four modules in the project (common, cli-client, server, and web-client). Only the server module (uses Kotlin JVM) contains the invalid error highlighting; excluding the invalid error highlighting that occurs in the build.gradle.kts files found in all modules.

[napperley]

Here is the link to the project (where the invalid error highlighting comes from): https://gitlab.com/napperley/repo-stats

[napperley]

You will need to follow these instructions in order to cover the webscene-core-js dependency in repo-stats:

1. Clone webscene-core ( https://gitlab.com/webscene/webscene-core )
2. In the dir where the project is cloned run the following: ./gradlew publish
3. Copy the local maven repos in common/build/repository/org and js/build/repository/org to repo-stats/web-client/libs

[orangy]

@h0tk3y can you take a look?

[h0tk3y]

Couldn't reproduce with IntelliJ IDEA 2018.3 EAP, Kotlin plugin 1.3.0. @napperley Which IDE and Kotlin plugin versions are you using?

[napperley]

Using IntelliJ 2018.2.5 and Kotlin plugin 1.3.0.

[napperley]

Appears as though the vast majority of the invalid error highlighting is with the Kotlin 1.3.0 standard library functions.

[napperley]

Looks as though copying the generated JS files to the server's asset directory causes IntelliJ's syntax checker to break: ./gradlew :server:deployClientToServer

[napperley]

Issue also occurs in IntelliJ 2018.3 with the latest stable version of the Kotlin plugin.

[napperley]

Some of the problems (that are caused by the issue) can be temporarily resolved by moving server/src/main/resources/static to a temp directory , and moving it back again after IntelliJ reevaluates all Kotlin source files that contain syntax issues.

[napperley]

@h0tk3y - I have submitted a issue on IntelliJ's broken Kotlin syntax checking when Gradle resources are present.

[h0tk3y]

Thanks!