java.lang.NullPointerException in the BugPattern HidingField

[jacobovazquez]

What version of Error Prone are you using?

2.3.1

Does this issue reproduce with the latest release?

2.3.1 is the latest release

What did you do?

Compile using the maven compiler plugin.

What did you expect to see?

The build completes with no errors.

What did you see instead?

Fails with a NullPointerException.

error-prone version: 2.3.1
BugPattern: HidingField
Stack Trace:
java.lang.NullPointerException
at com.sun.tools.javac.jvm.ClassReader.setParameters(ClassReader.java:2538)
at com.sun.tools.javac.jvm.ClassReader.readMethod(ClassReader.java:2436)
at com.sun.tools.javac.jvm.ClassReader.readClass(ClassReader.java:2710)
at com.sun.tools.javac.jvm.ClassReader.readClassBuffer(ClassReader.java:2775)
at com.sun.tools.javac.jvm.ClassReader.readClassFile(ClassReader.java:2788)
at com.sun.tools.javac.code.ClassFinder.fillIn(ClassFinder.java:348)
at com.sun.tools.javac.code.ClassFinder.complete(ClassFinder.java:285)
at com.sun.tools.javac.code.Symbol.complete(Symbol.java:633)
at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1314)
at com.sun.tools.javac.code.Symbol$ClassSymbol.flags(Symbol.java:1248)
at com.sun.tools.javac.code.Symbol$TypeSymbol.getEnclosedElements(Symbol.java:800)
at com.google.errorprone.bugpatterns.HidingField.matchClass(HidingField.java:79)
at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:581)
at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:145)
at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:808)
at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
at com.google.errorprone.scanner.Scanner.scan(Scanner.java:82)
at com.google.errorprone.scanner.Scanner.scan(Scanner.java:42)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:105)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:113)
at com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:144)
at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:602)
at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:145)
at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:591)
at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:56)
at com.google.errorprone.scanner.Scanner.scan(Scanner.java:64)
at com.google.errorprone.scanner.ErrorProneScannerTransformer.apply(ErrorProneScannerTransformer.java:43)
at com.google.errorprone.ErrorProneAnalyzer.finished(ErrorProneAnalyzer.java:152)
at com.sun.tools.javac.api.MultiTaskListener.finished(MultiTaskListener.java:120)
at com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1404)
at com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1353)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:946)
at com.sun.tools.javac.main.Main.compile(Main.java:302)
at com.sun.tools.javac.main.Main.compile(Main.java:162)
at com.sun.tools.javac.Main.compile(Main.java:57)
at com.sun.tools.javac.Main.main(Main.java:43)

[TheBigFatPanda1996]

Which Java class was this null pointer exception encountered ? If you're using eclipse, it should be mentioned along with the line number.

[cushon]

Please re-open if you're still seeing this or have an example that reproduce that reproduces the problem.