Compilation Failed about kotlin-koans

[mictaege]

I got this problem also when I work on Lesson 1/Task2.kt, when I click Check, it tips compilation failed.
can anyone help me ? note: I work on android studio V3.4.1, and my PC is windows 7

I have the same problem and my Android Studio version is 3.5.1

Exactly the same with IntelliJ IDEA 2019.3.4, latest Kotlin and EduTools plugins and jdk1.8.0_191

[jimandreas]

I just tried the EduTools JetBrains plugin on IntelliJ IDEA 2018.1.1 and it seems to work OK.
However I find it critical to look at the unit tests as I work on the solution to the koan - and I don't see where you can get a view of the unit test in the plugin. I recommend pulling in the repo to a folder on your hard drive by:

File->New->Project from Version Control->Git and then download the Koans repo:

https://github.com/Kotlin/kotlin-koans

Then you can run the Junit tests in the Project kotlin-koans/test hierarchy as you do the work. Just right click on the tests (Windows) and run or debug them. The IDE gives you lots of useful feedback about type information, runtime library help, and links to the documentation. Don't forget the links to the documentation as pointed out in the 0 Hello World entry (click on doc reference and on Windows hit Control-Q). Also use "Control B" to pop to declarations and Control-Alt-leftArrow to pop back to your work. Enjoy!!

[akki777-zz]

I realised recently @haposik has also raised the same issue (with the screenshot).
#148. Please look at this issue to get a clear view.

[jimandreas]

You might try running the Junit test manually and look for details on the build errors.

Try switching to the Project Files view in the Project tool window, then navigate to lesson2 / task6 / lesson2-task6_test (the task shown by @haposik) or to your particular lesson. Then you can run the test manually as indicated in the screenshot below. The View / Tool Windows / { Messages and Build } windows might have hints about the compiler complaints.

To switch back to plug in mode, select "Course" in the project window.

[akki777-zz]

I find this as a bug..so this should be solved, instead of finding a workaround.

[jimandreas]

What compiler errors are you seeing? This information should be in the View / Tool Windows / { Messages and Build } windows as you are seeing a compile errors. If you post your compile errors then the IntelliJ people will have clues about the problem.

[akki777-zz]

Following is the Error in Problems window. @jimandreas . And I have not touched this file.

This issue also has the screenshot -> #148

[jimandreas]

The lesson6 / task1 problem (Generics) is the last problem in project. It doesn't compile until you get the whole solution right. I confess I had to peek at the solution. Spoiler - my modified solution is below - if you paste this solution over the top of the:

fun partitionTo() = TODO()

line in the problem - this should compile and solve the problem. The solution is quite tricky - the syntax has to be exactly correct before the compile errors disappear. TYP = type of items in the collections, and COLL = the "flavor" (HashSet or ArrayList in this case) of the collection.

fun <TYP, COLL: MutableCollection<TYP>> Collection<TYP>.partitionTo(
        list1: COLL, list2: COLL, predicate: (TYP) -> Boolean)
        : Pair<COLL, COLL> {
    for (item in this) {
        if (predicate(item)) {
            list1.add(item)
        } else {
            list2.add(item)
        }
    }
    return Pair(list1, list2)
}

[akki777-zz]

Bro @jimandreas , you are not reading my posts properly. You are just answering for the sake of it. I wrote And I have not touched this file. in my previous post. The tasks should compile individually. I am working on Lesson 1/Task2.kt, why is it checking Lesson 6/Task1 ?

[jimandreas]

Sorry that I cannot help you. Can another reader attempt to provide help to @akki777 ?

[stiofand]

I have the same issue with all the Koans. I'm trying to get it running on gradle with Java 10, but I'm beginning to suspect this is the issue. Is there anywhere we can see the supported JVM numbers?

[akki777-zz]

I guess no one from the team cares to look into this or other issues. @svtk

[svtk]

Many things here.
About the initial problem with the Edu plugin. I've added a new issue https://youtrack.jetbrains.com/issue/EDU-1500, please provide more details there. That looks like a bug, but we need more details of how exactly to reproduce it (which versions of everything etc).

Another issue with tests: https://youtrack.jetbrains.com/issue/EDU-1005.

About Java versions: should work with all Java versions, but I can't guarantee that's not another bug with Java 10. @stevematdavies, if you could provide more details in the issue, we can check.

Sorry if I missed something. Edu plugin issues should be discussed in the tracker, where the plugin team can check that. So if other problems occur, please provide the details there. Thanks!

[ryanlijianchang]

I got this problem also when I work on Lesson 1/Task2.kt, when I click Check, it tips compilation failed.

can anyone help me ? note: I work on android studio V3.4.1, and my PC is windows 7

[xiaowx2010]

I got this problem also when I work on Lesson 1/Task2.kt, when I click Check, it tips compilation failed.

can anyone help me ? note: I work on android studio V3.4.1, and my PC is windows 7

I have the same problem and my Android Studio version is 3.5.1