google
BugPattern: MissingCasesInEnumSwitch java.lang.NullPointerException: Cannot invoke "com.sun.tools.javac.tree.JCTree.getStartPosition()" because "tree" is null
Please report this at https://github.com/google/error-prone/issues/new and include the following: [ERROR] [ERROR] error-prone version: 2.39.0 [ERROR] BugPattern: MissingCasesInEnumSwitch [ERROR] Stack Trace: [ERROR] java.lang.NullPointerException: Cannot invoke "com.sun.tools.javac.tree.JCTree.getStartPosition()" because "tree" is null [ERROR] at com.google.errorprone.util.ASTHelpers.getStartPosition(ASTHelpers.java:1954) [ERROR] at com.google.errorprone.bugpatterns.Switches.isDefaultCaseForSkew(Switches.java:98) [ERROR] at com.google.errorprone.bugpatterns.MissingCasesInEnumSwitch.matchSwitchExpression(MissingCasesInEnumSwitch.java:90) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.processMatchers(ErrorProneScanner.java:509) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitSwitchExpression(ErrorProneScanner.java:937) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitSwitchExpression(ErrorProneScanner.java:170) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCSwitchExpression.accept(JCTree.java:1450) [ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitReturn(TreeScanner.java:546) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitReturn(ErrorProneScanner.java:931) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitReturn(ErrorProneScanner.java:170) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1777) [ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:110) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:271) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:591) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:170) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1145) [ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:95) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitMethod(TreeScanner.java:223) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitMethod(ErrorProneScanner.java:818) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitMethod(ErrorProneScanner.java:170) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:989) [ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:95) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:110) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:118) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:202) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:619) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:170) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:896) [ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:110) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:118) [ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:151) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:631) [ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:170) [ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:625) [ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:66) [ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:58) [ERROR] at com.google.errorprone.scanner.ErrorProneScannerTransformer.apply(ErrorProneScannerTransformer.java:43) [ERROR] at com.google.errorprone.ErrorProneAnalyzer.finished(ErrorProneAnalyzer.java:231) [ERROR] at jdk.compiler/com.sun.tools.javac.api.MultiTaskListener.finished(MultiTaskListener.java:133) [ERROR] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1432) [ERROR] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1379) [ERROR] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:964) [ERROR] at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:104) [ERROR] at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.invocationHelper(JavacTaskImpl.java:152) [ERROR] at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:100) [ERROR] at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:94) [ERROR] at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:126) [ERROR] at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:214) [ERROR] at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:1228) [ERROR] at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:215) [ERROR] at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:126) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2(MojoExecutor.java:328) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute(MojoExecutor.java:316) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:174) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.access$000(MojoExecutor.java:75) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor$1.run(MojoExecutor.java:162) [ERROR] at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute(DefaultMojosExecutionStrategy.java:39) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:159) [ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:105) [ERROR] at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:193) [ERROR] at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:180) [ERROR] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317) [ERROR] at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) [ERROR] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317) [ERROR] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) [ERROR] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) [ERROR] at java.base/java.lang.Thread.run(Thread.java:1575)
Could you share the code (possibly stripped down) that reproduces this?
We are also affected by this regression in 2.39.0 Here's a stripped down reproducer:
import java.util.Map;
public class Reproducer {
public enum DataType {
NUMERIC, ASCII
}
private static final Map<String, DataType> DATA_TYPE_MAP = Map.of("aaa", DataType.NUMERIC);
public static Object getProcessor(String name) {
return switch (name) {
default -> {
DataType dataType = DATA_TYPE_MAP.get(name);
if (dataType != null) {
yield switch (dataType) {
case NUMERIC:
yield new Object();
default:
yield null;
};
}
yield null;
}
};
}
}
@graememorgan Is this supposed to be fixed now in 2.40.0? We are still getting hit with pretty much the same exception on JDK 21.0.7 (Eclipse Adoptium). The same reproducer I shared before can be used.
[ERROR] error-prone version: 2.40.0
[ERROR] BugPattern: MissingCasesInEnumSwitch
[ERROR] Stack Trace:
[ERROR] java.lang.NullPointerException: Cannot invoke "com.sun.tools.javac.tree.JCTree.getStartPosition()" because "tree" is null
[ERROR] at com.google.errorprone.util.ASTHelpers.getStartPosition(ASTHelpers.java:1953)
[ERROR] at com.google.errorprone.bugpatterns.Switches.isDefaultCaseForSkew(Switches.java:98)
[ERROR] at com.google.errorprone.bugpatterns.MissingCasesInEnumSwitch.matchSwitchExpression(MissingCasesInEnumSwitch.java:90)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.processMatchers(ErrorProneScanner.java:509)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitSwitchExpression(ErrorProneScanner.java:937)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitSwitchExpression(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCSwitchExpression.accept(JCTree.java:1409)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitYield(TreeScanner.java:1224)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitYield(ErrorProneScanner.java:1039)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitYield(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCYield.accept(JCTree.java:1684)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:591)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1104)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitIf(TreeScanner.java:487)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitIf(ErrorProneScanner.java:732)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitIf(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1584)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:591)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1104)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitCase(TreeScanner.java:402)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitCase(ErrorProneScanner.java:605)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitCase(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCCase.accept(JCTree.java:1374)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:119)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitSwitchExpression(TreeScanner.java:384)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitSwitchExpression(ErrorProneScanner.java:942)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitSwitchExpression(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCSwitchExpression.accept(JCTree.java:1409)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitReturn(TreeScanner.java:545)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitReturn(ErrorProneScanner.java:931)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitReturn(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1736)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:591)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1104)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitMethod(TreeScanner.java:224)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitMethod(ErrorProneScanner.java:818)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitMethod(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:948)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:119)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:203)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:619)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:855)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:119)
[ERROR] at jdk.compiler/com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:152)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:631)
[ERROR] at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:170)
[ERROR] at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:623)
[ERROR] at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:66)
[ERROR] at com.google.errorprone.scanner.Scanner.scan(Scanner.java:58)
[ERROR] at com.google.errorprone.scanner.ErrorProneScannerTransformer.apply(ErrorProneScannerTransformer.java:43)
[ERROR] at com.google.errorprone.ErrorProneAnalyzer.finished(ErrorProneAnalyzer.java:231)
[ERROR] at jdk.compiler/com.sun.tools.javac.api.MultiTaskListener.finished(MultiTaskListener.java:133)
[ERROR] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1436)
[ERROR] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1383)
[ERROR] at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:963)
[ERROR] at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:319)
[ERROR] at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:178)
[ERROR] at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:64)
[ERROR] at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:50)