在 SBT 中有 NPE，我应该在哪里报告？

Question

我有 SBT 版本 1.3.13，java openjdk 版本“11.0.8”2020-07-14 运行我的项目（sbt run in https://github.com/geek94/Akka-Https）我得到了一个 NPE，即：

Vlad4087688721:Akka-Https vpatryshev$ sbt run
[info] Loading project definition from /Users/vpatryshev/projects/Akka-Https/project
java.lang.NullPointerException
    at java.base/java.util.regex.Matcher.getTextLength(Matcher.java:1769)
    at java.base/java.util.regex.Matcher.reset(Matcher.java:416)
    at java.base/java.util.regex.Matcher.<init>(Matcher.java:253)
    at java.base/java.util.regex.Pattern.matcher(Pattern.java:1130)
    at java.base/java.util.regex.Pattern.split(Pattern.java:1249)
    at java.base/java.util.regex.Pattern.split(Pattern.java:1322)
    at sbt.IO$.pathSplit(IO.scala:744)
    at sbt.IO$.parseClasspath(IO.scala:859)
    at sbt.compiler.CompilerArguments.extClasspath(CompilerArguments.scala:62)
    at sbt.compiler.MixedAnalyzingCompiler$.withBootclasspath(MixedAnalyzingCompiler.scala:189)
    at sbt.compiler.MixedAnalyzingCompiler$.searchClasspathAndLookup(MixedAnalyzingCompiler.scala:167)
    at sbt.compiler.MixedAnalyzingCompiler$.apply(MixedAnalyzingCompiler.scala:177)
    at sbt.compiler.IC$.incrementalCompile(IncrementalCompiler.scala:138)
    at sbt.Compiler$.compile(Compiler.scala:128)
    at sbt.Compiler$.compile(Compiler.scala:114)
    at sbt.Defaults$.sbt$Defaults$$compileIncrementalTaskImpl(Defaults.scala:814)
    at sbt.Defaults$$anonfun$compileIncrementalTask.apply(Defaults.scala:805)
    at sbt.Defaults$$anonfun$compileIncrementalTask.apply(Defaults.scala:803)
    at scala.Function1$$anonfun$compose.apply(Function1.scala:47)
    at sbt.$tilde$greater$$anonfun$$u2219.apply(TypeFunctions.scala:40)
    at sbt.std.Transform$$anon.work(System.scala:63)
    at sbt.Execute$$anonfun$submit$$anonfun$apply.apply(Execute.scala:226)
    at sbt.Execute$$anonfun$submit$$anonfun$apply.apply(Execute.scala:226)
    at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
    at sbt.Execute.work(Execute.scala:235)
    at sbt.Execute$$anonfun$submit.apply(Execute.scala:226)
    at sbt.Execute$$anonfun$submit.apply(Execute.scala:226)
    at sbt.ConcurrentRestrictions$$anon$$anonfun.apply(ConcurrentRestrictions.scala:159)
    at sbt.CompletionService$$anon.call(CompletionService.scala:28)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:844)
[error] (compile:compileIncremental) java.lang.NullPointerException

所以，这是一个错误（即使是Java错误，也必须检查那种错误）。

Answer 1

根据您的 build.sbt，您使用的是 scala 2.11.6。

根据 Scala JDK COMPATIBILITY 文档，与 Java 11 一起使用的最低 Scala 版本是 Scala 2.11.12。

请尝试升级您的 Scala 版本。

在 SBT 中有 NPE，我应该在哪里报告？

Got an NPE in SBT, where do I report?

sbt