事情的经过是这样，我建立了一个含有多个子模块的 Maven 工程 a，为其中一个 Spring Boot 子模块引入了 Lombok 来生成字节码，然后我发现，如果把 a 放到一个含有汉字“一”的文件夹，使用 IDEA 运行 Spring Boot 子模块会报一个 Java 编译错误。上述任何条件不满足，这个问题就不会复现，满足则稳定复现。
报错信息
Information:java: 编译器 (10.0.2) 中出现异常错误。如果在 Bug Database ( http://bugs.java.com) 中没有找到该错误, 请通过 Java Bug 报告页 ( http://bugreport.java.com) 建立该 Java 编译器 Bug。请在报告中附上您的程序和以下诊断信息。谢谢。 Information:java: java.lang.IllegalArgumentException: directories not supported Information:java: at jdk.compiler/com.sun.tools.javac.file.PathFileObject.<init>(PathFileObject.java:353) Information:java: at lombok.javac.apt.Javac9BaseFileObjectWrapper.<init>(Javac9BaseFileObjectWrapper.java:42) Information:java: at lombok.javac.apt.LombokFileObjects$Java9Compiler.wrap(LombokFileObjects.java:172) Information:java: at lombok.javac.apt.LombokFileObjects.createIntercepting(LombokFileObjects.java:161) Information:java: at lombok.javac.apt.InterceptingJavaFileManager.getJavaFileForOutput(InterceptingJavaFieManager.java:53) Information:java: at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeClass(ClassWriter.java:1677) Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:749) Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1627) Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1595) Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:965) Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:100) Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.handleExceptions(JavacTaskImpl.java:142) Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:96) Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:90) Information:java: at org.jetbrains.jps.javac.JavacMain.compile(JavacMain.java:198) Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.compileJava(JavaBuilder.java:453) Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.compile(JavaBuilder.java:317) Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.doBuild(JavaBuilder.java:244) Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.build(JavaBuilder.java:202) Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:1314) Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:991) Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:1063) Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:954) Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:787) Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:376) Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:183) Information:java: at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:138) Information:java: at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:308) Information:java: at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:137) Information:java: at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:235) Information:java: at org.jetbrains.jps.service.impl.SharedThreadPoolImpl.lambda$executeOnPooledThread$0(SharedThreadPoolImpl.java:42) Information:java: at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514) Information:java: at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) Information:java: at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135) Information:java: at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) Information:java: at java.base/java.lang.Thread.run(Thread.java:844) Information:java: Errors occurred while compiling module 'a' Information:javac 10.0.2 was used to compile java sources Information:2018/7/24 下午 3:11 - Compilation completed with 1 error and 0 warnings in 10 s 112 ms Error:java: Compilation failed: internal java compiler error 系统环境
- Java
java 10.0.2 2018-07-17 Java(TM) SE Runtime Environment 18.3 (build 10.0.2+13) Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.2+13, mixed mode) - IntelliJ IDEA
IntelliJ IDEA 2018.1.6 (Ultimate Edition) Build #IU-181.5540.7, built on July 11, 2018 JRE: 1.8.0_152-release-1136-b39 x86_64 JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o macOS 10.13.6 ``` 
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