Note: ./com/rc/test/TestPattern.java uses preview language features.
Note: Recompile with -Xlint:preview for details.
An exception has occurred in the compiler (14-internal). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program, the following diagnostic, and the parameters passed to the Java compiler in your report. Thank you.
java.lang.AssertionError
        at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:155)
        at jdk.compiler/com.sun.tools.javac.util.Assert.check(Assert.java:46)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitVarDef(Gen.java:1066)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:970)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genDef(Gen.java:597)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:632)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:618)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStats(Gen.java:669)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genCond(Gen.java:758)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitUnary(Gen.java:2040)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCUnary.accept(JCTree.java:2065)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:860)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitParens(Gen.java:1989)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCParens.accept(JCTree.java:1958)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:860)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitConditional(Gen.java:1878)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCConditional.accept(JCTree.java:1460)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:860)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitLetExpr(Gen.java:2352)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$LetExpr.accept(JCTree.java:3118)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:860)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitVarDef(Gen.java:1064)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:970)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genDef(Gen.java:597)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:632)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:618)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStats(Gen.java:669)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1080)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1034)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genDef(Gen.java:597)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genStat(Gen.java:632)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:950)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:913)
        at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:880)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genDef(Gen.java:597)
        at jdk.compiler/com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2391)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:756)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1646)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1614)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:972)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:318)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:176)
        at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:57)
        at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:43)