FULL PRODUCT VERSION :
java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
Exception when compiling a class with -XDdumpLambdaToMethodStats -Xdiags:verbose:

$ javac -XDdumpLambdaToMethodStats -Xdiags:verbose Test.java

An exception has occurred in the compiler (1.8.0_51). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.NullPointerException
at com.sun.tools.javac.code.Symbol$MethodSymbol.getKind(Symbol.java:1602)
at com.sun.tools.javac.code.Symbol$MethodSymbol.isStaticOrInstanceInit(Symbol.java:1613)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitMethodSymbol(RichDiagnosticFormatter.java:422)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitMethodSymbol(RichDiagnosticFormatter.java:335)
at
...

REGRESSION. Last worked in version 8u51

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Exception when compiling a class:

$ javac -XDdumpLambdaToMethodStats -Xdiags:verbose Test.java



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Compilation successful, no exception
ACTUAL -
See the exception in Error Messages section

ERROR MESSAGES/STACK TRACES THAT OCCUR :
An exception has occurred in the compiler (1.8.0_51). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.NullPointerException
at com.sun.tools.javac.code.Symbol$MethodSymbol.getKind(Symbol.java:1602)
at com.sun.tools.javac.code.Symbol$MethodSymbol.isStaticOrInstanceInit(Symbol.java:1613)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitMethodSymbol(RichDiagnosticFormatter.java:422)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitMethodSymbol(RichDiagnosticFormatter.java:335)
at com.sun.tools.javac.code.Symbol$MethodSymbol.accept(Symbol.java:1638)
at com.sun.tools.javac.code.Printer.visit(Printer.java:147)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:196)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments(AbstractDiagnosticFormatter.java:161)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:111)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMeta(BasicDiagnosticFormatter.java:184)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatDiagnostic(BasicDiagnosticFormatter.java:100)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.format(AbstractDiagnosticFormatter.java:117)
at com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:113)
at com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:68)
at com.sun.tools.javac.util.Log.writeDiagnostic(Log.java:622)
at com.sun.tools.javac.util.Log$DefaultDiagnosticHandler.report(Log.java:584)
at com.sun.tools.javac.util.Log.report(Log.java:562)
at com.sun.tools.javac.util.AbstractLog.note(AbstractLog.java:215)
at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.analyzeLambda(LambdaToMethod.java:1277)
at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitLambda(LambdaToMethod.java:1260)
at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1624)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
at com.sun.tools.javac.tree.TreeTranslator.visitApply(TreeTranslator.java:275)
at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1465)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:245)
at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1296)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:162)
at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitBlock(LambdaToMethod.java:1172)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:145)
at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitMethodDef(LambdaToMethod.java:1299)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
at com.sun.tools.javac.tree.TreeTranslator.visitClassDef(TreeTranslator.java:134)
at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.visitClassDef(LambdaToMethod.java:1209)
at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:693)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.analyzeAndPreprocessClass(LambdaToMethod.java:1162)
at com.sun.tools.javac.comp.LambdaToMethod$LambdaAnalyzerPreprocessor.access$300(LambdaToMethod.java:1119)
at com.sun.tools.javac.comp.LambdaToMethod.visitClassDef(LambdaToMethod.java:232)
at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:693)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.LambdaToMethod.translate(LambdaToMethod.java:197)
at com.sun.tools.javac.comp.LambdaToMethod.translate(LambdaToMethod.java:190)
at com.sun.tools.javac.comp.LambdaToMethod.translateTopLevelClass(LambdaToMethod.java:217)
at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1493)
at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1356)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:901)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:860)
at com.sun.tools.javac.main.Main.compile(Main.java:523)
at com.sun.tools.javac.main.Main.compile(Main.java:381)
at com.sun.tools.javac.main.Main.compile(Main.java:370)
at com.sun.tools.javac.main.Main.compile(Main.java:361)
at com.sun.tools.javac.Main.compile(Main.java:56)
at com.sun.tools.javac.Main.main(Main.java:42)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
class Test {
    public static void main(String... a) {
        new Test().run();
        new Test().run();
    }

    public void run() {
        printHash(this::m);
        printHash(Test::sm);
        printHash(() -> { o = new Object(); });
        printHash(() -> { s = new Object(); });
    }

    private void printHash(Runnable function)
    {
        System.out.println(function + "; hash=" + function.hashCode());
    }

    private static void sm() {
    }

    private void m() {
    }
    
    private Object o;
    private static Object s;
}

---------- END SOURCE ----------