im getting a compile error that i dont understand: <https://i.imgur.com/6kNkSRr.png> it says "unreso...

# announcements

[LastExceed]

im getting a compile error that i dont understand:

https://i.imgur.com/6kNkSRr.png▾

it says "unresolved reference" even though in the editor it seems to be recognized just fine, it shows up in autocomplete and i can navigate to the implementation just fine. whats going on here?

[Sergei Dubrov [JB]]

Hi! I checked with the easiest sample and issue does not reproduce:

import javax.sound.sampled.AudioInputStream

fun test(ais: AudioInputStream) {
    ais.readNBytes(ais.available()) // compiles fine
}

Can you send a code example?

[LastExceed]

I'll try to narrow it down

[Alex Crafford]

I see this happen in Android Studio on occasion and normally Invalidate and Restart does the trick.

[LastExceed]

import <http://java.io|java.io>.ByteArrayInputStream
import <http://java.io|java.io>.ByteArrayOutputStream
import javax.sound.sampled.*
import kotlin.concurrent.thread

fun main() {
    val format = AudioFormat(
        192000f,
        16,
        1,
        true,
        true
    )
    val info = <http://DataLine.Info|DataLine.Info>(TargetDataLine::class.java, format)
    if (!AudioSystem.isLineSupported(info)) {
        error("Line not supported")
    }
    val line = AudioSystem.getLine(info) as TargetDataLine
    line.open(format)
    line.start()
    println("Start capturing...")

    val ais = AudioInputStream(line)
    val baos = ByteArrayOutputStream()
    var stop = false
    thread {
        Thread.sleep(3000)
        stop = true
    }
    while (!stop) {
        val buffer = ais.readNBytes(ais.available())
        //workaround: 
        //val buffer = ByteArray(ais.available())
        //ais.read(buffer)
        baos.write(buffer)
    }
    line.stop()
    line.close()
    println("done")
    val recorded = AudioInputStream(ByteArrayInputStream(baos.toByteArray()), format, baos.size().toLong())


    readLine()

    val clip = AudioSystem.getClip()
    clip.open(recorded)
    clip.start()
}

records 3 seconds audio, then plays it back after pressing enter. i found a workaround but i'd still like to understand the error

[LastExceed]

IDE restart or gradle-reimport didnt fix it

[Sergei Dubrov [JB]]

Build is successful for this example in my case.

[Sergei Dubrov [JB]]

Are you getting a compile error?

[LastExceed]

all i get is whats shown on the screenshot

[Sergei Dubrov [JB]]

can you share your build.gradle?

[LastExceed]

plugins {
    kotlin("jvm") version "1.3.61"
}

group = "lastexceed"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
}

dependencies {
    implementation(kotlin("stdlib-jdk8"))
    compile(files("src/main/resources/jnativehook-2.1.0.jar"))
}

tasks {
    compileKotlin {
        kotlinOptions.jvmTarget = "1.8"
    }
    compileTestKotlin {
        kotlinOptions.jvmTarget = "1.8"
    }
}

[Sergei Dubrov [JB]]

Still unable to reproduce. Seems to be some sporadic bug. Can you attach your project?

[LastExceed]

alright sec

[LastExceed]

KeyboardMouseTester.zip

KeyboardMouseTester.zip

[Jamie Taylor]

Could it be a java version issue? readNBytes was only introduced in Java 9.

[LastExceed]

i use 13.0.1

[Sergei Dubrov [JB]]

It compiles fine at my site. Did you try Shift+Shift -> Invalidate Caches / Restart... ?

[LastExceed]

not yet, gonna try that now

[LastExceed]

didn't help

[Sergei Dubrov [JB]]

Ok, lets go on. 😃 Attach please "File -> Export Settings...". And I'll try to compile with Java 13.0.1

[LastExceed]

there is no "export settings" option for me

[LastExceed]

https://i.imgur.com/QxiS4wB.png▾

[LastExceed]

or am i blind?

[Sergei Dubrov [JB]]

just a sec

[Sergei Dubrov [JB]]

Maybe this is the reason? https://intellij-support.jetbrains.com/hc/en-us/community/posts/360002086719-I-can-t-see-import-setting-and-export-setting-in-File-menu-

[LastExceed]

ah yes thats probably it

[LastExceed]

how do i disable it?

[LastExceed]

nvm found it

[LastExceed]

settings.zip

settings.zip

[Sergei Dubrov [JB]]

Compiles fine with Oracke JDK 13.0.1

[Sergei Dubrov [JB]]

Problem seems to be with AdoptOpenJDK

[LastExceed]

were you able to reproduce?

[LastExceed]

with AdpotOpenJDK i mean

[Sergei Dubrov [JB]]

not yet. downloading it now

[Sergei Dubrov [JB]]

Also compiled successfully

[LastExceed]

(╯°□°）╯︵ ┻━┻

[Sergei Dubrov [JB]]

The only difference I see now is My AdoptOpenJDK installation folder named jdk-13.0.1.9-hotspot and yours is jdk-13.0.1+9

[Sergei Dubrov [JB]]

Can you try to re-compile this code with different jdk?

[LastExceed]

i can, which should i use?

[Sergei Dubrov [JB]]

e.q. one by Oracle

[Sergei Dubrov [JB]]

Also what is your Windows version?

[Sergei Dubrov [JB]]

And Idea version (Help -> About)?

[LastExceed]

windowsVersion 10.0.18363 Build 18363

[LastExceed]

IDEA 2019.3 build 193.5233.102

[LastExceed]

btw is it normal that it says

implementation(kotlin("stdlib-jdk8"))

and

kotlinOptions.jvmTarget = "1.8"

in the build.gradle even though the project jdk is 1.13 and not 1.8 ? (not that familiar with this stuff)

[Sergei Dubrov [JB]]

It is correct. Don't remember why exactly but this it what should be there

[LastExceed]

installed OracleJDK 13.01 now, problem persists

[LeoColman]

Try deleting the .idea folder

[LeoColman]

When this kiind of thing happens I just delete .idea and Invalidate/Restart

[LastExceed]

done, didnt help

[Sergei Dubrov [JB]]

@LastExceed did you also tried to delete .idea folder?

[LastExceed]

yes thats what i just tried

[Sergei Dubrov [JB]]

I can suggest to create a new project and try to do all the same in it. It is definitely some configurational bug.

[LastExceed]

done, didnt help

[LastExceed]

i created a new project and just pasted the same code from above in it, same error

[Sergei Dubrov [JB]]

magic

[Sergei Dubrov [JB]]

@Alexey Belkov [JB] do you have any idea?

[Sergei Dubrov [JB]]

@LastExceed did it help to compile with different JDK?

[LastExceed]

no

[Sergei Dubrov [JB]]

What is the second error message is there?

[LastExceed]

i think that was unrelated (when i was still working on the whole project), i dont have that second error now

[Sergei Dubrov [JB]]

@LastExceed If your problem still actual I suggest you to check the same name resolution in Java. In case it does not resolve in Java (actually in any case) I would recommend you to ask IDEA support. They have more experience in such a weird problems.

[LastExceed]

ayy, we're making progress: i re-implemented the code sample in java and now it highlights and error in the editor: Usage of API documented as @since 11+ which is strange because my project language level is set to 13 (and setting it to 11 doesn't solve it either). HOWEVER the IDE still gave me the suggestion "set language level to 11" and clicking that solved the problem, but I am now oblivious to what was actually the problem since as i said the the project language level was already high enough and I am now unable to reproduce the error anymore even if i create a whole new project like before.

I'd really like to understand what's going on here especially since there is definitely something on the Kotlin side that needs to be fixed, can you explain? @Sergei Dubrov [JB]

[Sergei Dubrov [JB]]

Please report a ticket for false positive inspection at https://youtrack.jetbrains.com/issues/IDEA? Regarding the problem with resolve in Kotlin, it is not clear how it can be reproduced. It could also be an IDEA bug. In case you find a way how to do that please report it at https://youtrack.jetbrains.com/issues/KT?.