我的环境是Windows 10 x64 / Scala 2.11.7 / Msys2最新版本。
从MSys2控制台运行Scala时，我看到以下内容：
$ scala
[ERROR] Terminal initialization failed; falling back to unsupported
java.lang.NoClassDefFoundError: Could not initialize class org.fusesource.jansi.internal.Kernel32
at org.fusesource.jansi.internal.WindowsSupport.getConsoleMode(WindowsSupport.java:50)
at jline.WindowsTerminal.getConsoleMode(WindowsTerminal.java:204)
at jline.WindowsTerminal.init(WindowsTerminal.java:82)
at jline.TerminalFactory.create(TerminalFactory.java:101)
at jline.TerminalFactory.get(TerminalFactory.java:158)
at jline.console.ConsoleReader.<init>(ConsoleReader.java:229)
at jline.console.ConsoleReader.<init>(ConsoleReader.java:221)
at jline.console.ConsoleReader.<init>(ConsoleReader.java:209)
at scala.tools.nsc.interpreter.jline.JLineConsoleReader.<init>(JLineReader.scala:61)
at scala.tools.nsc.interpreter.jline.InteractiveReader.<init>(JLineReader.scala:33)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at scala.tools.nsc.interpreter.ILoop$$anonfun$scala$tools$nsc$interpreter$ILoop$$instantiate$1$1.apply(ILoop.scala:865)
at scala.tools.nsc.interpreter.ILoop$$anonfun$scala$tools$nsc$interpreter$ILoop$$instantiate$1$1.apply(ILoop.scala:862)
at scala.tools.nsc.interpreter.ILoop.scala$tools$nsc$interpreter$ILoop$$mkReader$1(ILoop.scala:871)
at scala.tools.nsc.interpreter.ILoop$$anonfun$15$$anonfun$apply$8.apply(ILoop.scala:875)
at scala.tools.nsc.interpreter.ILoop$$anonfun$15$$anonfun$apply$8.apply(ILoop.scala:875)
at scala.util.Try$.apply(Try.scala:192)
at scala.tools.nsc.interpreter.ILoop$$anonfun$15.apply(ILoop.scala:875)
at scala.tools.nsc.interpreter.ILoop$$anonfun$15.apply(ILoop.scala:875)
at scala.collection.immutable.Stream.map(Stream.scala:418)
at scala.tools.nsc.interpreter.ILoop.chooseReader(ILoop.scala:875)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1$$anonfun$apply$mcZ$sp$2.apply(ILoop.scala:916)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:916)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:911)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:911)
at scala.reflect.internal.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:97)
at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:911)
at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:74)
at scala.tools.nsc.MainGenericRunner.run$1(MainGenericRunner.scala:87)
at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:98)
at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:103)
at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)
Welcome to Scala version 2.11.7 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_79).
Type in expressions to have them evaluated.
Type :help for more information.
scala>
从cmd.exe运行时，它按预期工作。为了调试这个问题，我尝试了以下Scala程序：
object Test extends App {
println(org.fusesource.jansi.internal.WindowsSupport.getConsoleMode)
}
从Msys2运行时，会产生以下错误：
java.lang.UnsatisfiedLinkError: Could not load library. Reasons: [no jansi in java.library.path]
at org.fusesource.hawtjni.runtime.Library.doLoad(Library.java:182)
at org.fusesource.hawtjni.runtime.Library.load(Library.java:140)
at org.fusesource.jansi.internal.Kernel32.<clinit>(Kernel32.java:37)
at org.fusesource.jansi.internal.WindowsSupport.getConsoleMode(WindowsSupport.java:50)
at Test$.delayedEndpoint$Test$1(Test.scala:5)
at Test$delayedInit$body.apply(Test.scala:1)
at scala.Function0$class.apply$mcV$sp(Function0.scala:34)
at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
at scala.App$$anonfun$main$1.apply(App.scala:76)
at scala.App$$anonfun$main$1.apply(App.scala:76)
at scala.collection.immutable.List.foreach(List.scala:381)
at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
at scala.App$class.main(App.scala:76)
at Test$.main(Test.scala:1)
at Test.main(Test.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at scala.reflect.internal.util.ScalaClassLoader$$anonfun$run$1.apply(ScalaClassLoader.scala:70)
at scala.reflect.internal.util.ScalaClassLoader$class.asContext(ScalaClassLoader.scala:31)
at scala.reflect.internal.util.ScalaClassLoader$URLClassLoader.asContext(ScalaClassLoader.scala:101)
at scala.reflect.internal.util.ScalaClassLoader$class.run(ScalaClassLoader.scala:70)
at scala.reflect.internal.util.ScalaClassLoader$URLClassLoader.run(ScalaClassLoader.scala:101)
at scala.tools.nsc.CommonRunner$class.run(ObjectRunner.scala:22)
at scala.tools.nsc.ObjectRunner$.run(ObjectRunner.scala:39)
at scala.tools.nsc.CommonRunner$class.runAndCatch(ObjectRunner.scala:29)
at scala.tools.nsc.ObjectRunner$.runAndCatch(ObjectRunner.scala:39)
at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:65)
at scala.tools.nsc.MainGenericRunner.run$1(MainGenericRunner.scala:87)
at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:98)
at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:103)
at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)
我尝试了什么并且它不起作用：
还有一件事：问题不影响sbt;例如，运行“sbt console”为我提供了一个可用的Scala命令行，尽管版本为2.10.4。
答案 0 :(得分：1)
问题是由scala目录中的scala/bin shell脚本与同一目录中的scala.bat之间的名称冲突引起的。 Msys2运行shell脚本，而cmd.exe运行批处理文件。显然，shell脚本不适合Msys2，这会导致我目睹的错误。从MSys2发出cmd //c scala.bat会产生一个功能性Scala命令行。
编辑scala shell脚本以支持MSys2也是微不足道的：https://gist.github.com/kirillkh/a9ba2e00ef2e901f13bf
我在GitHub上打开了一个带有此更改的请求：https://github.com/scala/scala/pull/4674