intelliJ“未知工件。未解析或建立索引”，用于使用Scala 2.13.1进行Scalatest，sbt 1.3.3

Question

IntelliJ中的以下组合给出了“未知工件”错误。

• scala 2.13.1
• Java 13 JDK
• sbt 1.3.3

以下组合不会出现错误。

• scala 2.12.10
• Java 13 JDK
• sbt 1.3.3

[类似问题here的建议没有帮助：

• File / InvalidateAndRestart
• “更新项目解析器的索引”

我想念什么？

Github上的最小项目：https://github.com/hcetinkaya/sbt-scalatest-error-demo

我的系统：

环境（已更新）：

OS: Windows 10.0 (Build 15063) VM on a VMWare 7.1
Scala Plugin: 2019.2.36
IntelliJ IDEA: 2019.2.3 (Ultimate Edition)
Build #IU-192.6817.14, built on September 23, 2019 
with 
    Runtime version: 11.0.4+10-b304.69 amd64
    VM: OpenJDK 64-Bit Server VM by Jetbrains

JAVA_HOME: E:\apps\java\jdk-13
SBT_HOME: E:\apps\sbt\sbt-1.3.3\sbt

build.sbt：

scalaVersion := "2.13.1" // "2.12.10" is OK. "2.13.1" gives an "unknown artifact" error
lazy val root = project.in(file("."))
  .settings(
    libraryDependencies ++= Seq(
      "org.scalatest" %% "scalatest" % "3.0.8" % Test
    )
)

build.properties：

sbt.version = 1.3.3

IntelliJ项目结构：

Project Structure 
    Project
        Project SDK: java 13 language level: 13
    Modules
        all sources ->  language level: 13 /project default
                        dependencies Module SDK: project sdk

IntelliJ设置：

Build, Execution, Deployment
    Build Tools
        sbt 
            jre: E:\apps\java\jdk-13
            Launcher: E:\apps\sbt\sbt-1.3.3\bin\sbt-launch.jar
    Compiler
        Scala Compiler Server
            Use compile Server for Scala: checked
            JDK: Project default
            JVM max heap, MB: 1024

UPDATE：

sbt产生以下错误日志：

error: error while loading String, class file '/modules/java.base/java/lang/String.class' is broken
(class java.lang.NullPointerException/null)

详细信息（切碎）：

[info] Loading global plugins from C:\Users\hce\.sbt\1.0\plugins
[info] Updating ProjectRef(uri("file:/C:/Users/hce/.sbt/1.0/plugins/"), "global-plugins")...
[info] Done updating.
[info] Loading project definition from E:\learn\sbt\sbt-getting-started\project
[info] Updating ProjectRef(uri("file:/E:/learn/sbt/sbt-getting-started/project/"), "sbt-getting-started-build")...
[info] Done updating.
error: error while loading String, class file '/modules/java.base/java/lang/String.class' is broken
(class java.lang.NullPointerException/null)
[error] java.io.IOError: java.lang.RuntimeException: /packages cannot be represented as URI
[error]         at java.base/jdk.internal.jrtfs.JrtPath.toUri(JrtPath.java:176)
[error]         at scala.tools.nsc.classpath.JrtClassPath.asURLs(DirectoryClassPath.scala:204)
[error]         at scala.tools.nsc.classpath.AggregateClassPath.$anonfun$asURLs$1(AggregateClassPath.scala:55)
[error]         at scala.collection.TraversableLike.$anonfun$flatMap$1(TraversableLike.scala:240)
[error]         at scala.collection.Iterator.foreach(Iterator.scala:937)
[error]         at scala.collection.Iterator.foreach$(Iterator.scala:937)
[error]         at scala.collection.AbstractIterator.foreach(Iterator.scala:1425)
[error]         at scala.collection.IterableLike.foreach(IterableLike.scala:70)
...
[error] Caused by: java.lang.RuntimeException: /packages cannot be represented as URI
[error]         at java.base/jdk.internal.jrtfs.JrtPath.toUri(JrtPath.java:176)
[error]         at scala.tools.nsc.classpath.JrtClassPath.asURLs(DirectoryClassPath.scala:204)
[error]         at scala.tools.nsc.classpath.AggregateClassPath.$anonfun$asURLs$1(AggregateClassPath.scala:55)
[error]         at scala.collection.TraversableLike.$anonfun$flatMap$1(TraversableLike.scala:240)
[error]         at scala.collection.Iterator.foreach(Iterator.scala:937)
[error]         at scala.collection.Iterator.foreach$(Iterator.scala:937)
[error]         at scala.collection.AbstractIterator.foreach(Iterator.scala:1425)
[error]         at scala.collection.IterableLike.foreach(IterableLike.scala:70)
[error]         at scala.collection.IterableLike.foreach$(IterableLike.scala:69)
[error]         at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
[error]         at scala.collection.TraversableLike.flatMap(TraversableLike.scala:240)
[error]         at scala.collection.TraversableLike.flatMap$(TraversableLike.scala:237)
[error]         at scala.collection.AbstractTraversable.flatMap(Traversable.scala:104)
[error]         at scala.tools.nsc.classpath.AggregateClassPath.asURLs(AggregateClassPath.scala:55)
...
[error]         at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:111)
[error]         at xsbt.boot.Launch$.withContextLoader(Launch.scala:130)
[error]         at xsbt.boot.Launch$.run(Launch.scala:111)
[error]         at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:37)
[error]         at xsbt.boot.Launch$.launch(Launch.scala:119)
[error]         at xsbt.boot.Launch$.apply(Launch.scala:20)
[error]         at xsbt.boot.Boot$.runImpl(Boot.scala:56)
[error]         at xsbt.boot.Boot$.main(Boot.scala:18)
[error]         at xsbt.boot.Boot.main(Boot.scala)
[error] java.io.IOError: java.lang.RuntimeException: /packages cannot be represented as URI

UPDATE 2：

以下组合和步骤对我有用

• scala 2.13.1
• Java OpenJDK 13.0.1（将IntelliJ sbt选项设置为OpenJDK）
• sbt 1.3.3（将IntelliJ sbt-launch.jar选项设置为sbt 1.3.3目录）

步骤：

• 在命令行中创建一个新的示例项目（请参见https://www.scala-sbt.org/1.x/docs/sbt-by-example.html）
• sbt编译，测试应该可以工作
• 在IntelliJ中导入该项目

IntelliJ仍显示“未知工件”消息，但sbt可以编译，可以正常工作。

[我认为，新安装的IntelliJ在为Cousier编译scala2_12桥时遇到问题。

重新编译了命令行，现在我可以在项目目录中看到scalatest_2.13，它之前不存在

null\Coursier\cache\v1\https\repo1.maven.org\maven2\org\scalatest\scalatest_2.13

Answer 1

有人知道如何解决该问题