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  1. JDK
  2. JDK-8235564

NPE in Java Compiler 12 and 13

    Details

    • Subcomponent:
    • CPU:
      x86_64
    • OS:
      generic

      Description

      ADDITIONAL SYSTEM INFORMATION :
      Linux Debian buster 64-bit. OpenJDK 13 and Oracle JDK 12. Bug does not occur in my version of Java 11.


      A DESCRIPTION OF THE PROBLEM :
      NPE in Java Compiler when attempting to compile invalid source code using Java 12 and 13.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      `javac Test.java` with either 13 or 12.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      The code is invalid so should not compile. I expect something similar to what Java 11 returns:
      ```
      $ /usr/lib/jvm/jdk-11.0.4/bin/java -version
      java version "11.0.4" 2019-07-16 LTS
      Java(TM) SE Runtime Environment 18.9 (build 11.0.4+10-LTS)
      Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.4+10-LTS, mixed mode)
      $ /usr/lib/jvm/jdk-11.0.4/bin/javac Test.java
      Test.java:5: error: invalid method reference
              function(Test::unknown);
                       ^
        cannot find symbol
          symbol: method unknown()
          location: class Test
      1 error
      ```
      ACTUAL -
      $ /usr/lib/jvm/jdk-13/bin/java -version
      openjdk version "13" 2019-09-17
      OpenJDK Runtime Environment (build 13+33)
      OpenJDK 64-Bit Server VM (build 13+33, mixed mode, sharing)
      $ /usr/lib/jvm/jdk-13/bin/javac Test.java
      An exception has occurred in the compiler (13). 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.NullPointerException
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitApply(Flow.java:1334)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1737)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:405)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.visitExec(TreeScanner.java:218)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1523)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:405)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitBlock(Flow.java:1083)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1030)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:405)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitMethodDef(Flow.java:1049)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:876)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:405)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitClassDef(Flow.java:1012)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:784)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:405)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.analyzeTree(Flow.java:1427)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.analyzeTree(Flow.java:1417)
              at jdk.compiler/com.sun.tools.javac.comp.Flow.analyzeTree(Flow.java:217)
              at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1406)
              at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1380)
              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)
      $ /usr/lib/jvm/jdk-12.0.2/bin/java -version
      java version "12.0.2" 2019-07-16
      Java(TM) SE Runtime Environment (build 12.0.2+10)
      Java HotSpot(TM) 64-Bit Server VM (build 12.0.2+10, mixed mode, sharing)
      $ /usr/lib/jvm/jdk-12.0.2/bin/javac Test.java
      An exception has occurred in the compiler (12.0.2). 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 and the following diagnostic in your report. Thank you.
      java.lang.NullPointerException
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitApply(Flow.java:1304)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1709)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:394)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.visitExec(TreeScanner.java:218)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1519)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:394)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitBlock(Flow.java:1060)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1026)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:394)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitMethodDef(Flow.java:1027)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:872)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:394)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitClassDef(Flow.java:990)
              at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:780)
              at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:394)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.analyzeTree(Flow.java:1396)
              at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.analyzeTree(Flow.java:1386)
              at jdk.compiler/com.sun.tools.javac.comp.Flow.analyzeTree(Flow.java:217)
              at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1401)
              at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1375)
              at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:973)
              at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:311)
              at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:170)
              at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:57)
              at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:43)


      ---------- BEGIN SOURCE ----------
      public class Test {

          public static void main(final String... args) {
              function(Test::unknown);
          }

          private static void function(final String parameter) {}

      }

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

      CUSTOMER SUBMITTED WORKAROUND :
      Don't write code that doesn't compile.

      FREQUENCY : always


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              • Assignee:
                vromero Vicente Arturo Romero Zaldivar
                Reporter:
                webbuggrp Webbug Group
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                • Created:
                  Updated: