# devopsgym / testgen__spotbugs__spotbugs-2020 - taskset: [devopsgym](https://harnessreport.com/tasks/devopsgym.md) - difficulty: hard - category: test-generation - language: - runnable from the site: no - agent timeout: 3000s ## Results by harness _none yet_ ## Instruction ``` The following text contains a user issue (in <issue/> brackets) posted at a repository. Further, you are provided with file contents of several files in the repository that contain relevant code (in <code> brackets). It may be necessary to use code from third party dependencies or files not contained in the attached documents however. Your task is to identify the issue and implement a test case that verifies a proposed solution to this issue. More details at the end of this text. <issue> ## Code ```java public class IssueXXX { static class ATNSimulator { public int adaptivePredict() { return 0; } } static class ParserATNSimulator extends ATNSimulator { } static class Recognizer<ATNInterpreter extends ATNSimulator> { public ATNInterpreter getInterpreter() { return null; } } static class BaseParser extends Recognizer<ParserATNSimulator> { } public static class Parser extends BaseParser { public void text() { int _alt = 1; do { switch (_alt) { case 1: if (_alt == 1) { continue; } break; default: throw new RuntimeException(); } _alt = getInterpreter().adaptivePredict(); } while (_alt != 2); } }} ``` ## Bytecode ``` // access flags 0x1 public text()V L0 LINENUMBER 29 L0 ICONST_1 ISTORE 1 L1 LINENUMBER 31 L1 FRAME APPEND [I] ILOAD 1 LOOKUPSWITCH 1: L2 default: L3 L2 LINENUMBER 33 L2 FRAME SAME ILOAD 1 ICONST_1 IF_ICMPNE L4 L5 LINENUMBER 34 L5 GOTO L6 L3 LINENUMBER 38 L3 FRAME SAME NEW java/lang/RuntimeException DUP INVOKESPECIAL java/lang/RuntimeException.<init> ()V ATHROW L4 LINENUMBER 40 L4 FRAME SAME ALOAD 0 INVOKEVIRTUAL ghIssues/Issue2017$Parser.getInterpreter ()LghIssues/Issue2017$ATNSimulator; CHECKCAST ghIssues/Issue2017$ParserATNSimulator INVOKEVIRTUAL ghIssues/Issue2017$ParserATNSimulator.adaptivePredict ()I ISTORE 1 L6 LINENUMBER 41 L6 FRAME SAME ILOAD 1 ICONST_2 IF_ICMPNE L1 L7 LINENUMBER 42 L7 RETURN L8 LOCALVARIABLE this LghIssues/Issue2017$Parser; L0 L8 0 LOCALVARIABLE _alt I L1 L8 1 MAXSTACK = 2 MAXLOCALS = 2 ``` ## Exception ``` The following errors occurred during analysis: Can't get stack offset 0 from [] @ 40 in ghIssues.IssueXXXX$Parser.text : ()V java.lang.IllegalArgumentException: 0 is not a value stack offset At edu.umd.cs.findbugs.OpcodeStack.getStackItem(OpcodeStack.java:3156) At edu.umd.cs.findbugs.detect.FindReturnRef.afterOpcode(FindReturnRef.java:300) At edu.umd.cs.findbugs.visitclass.DismantleBytecode.visit(DismantleBytecode.java:880) At edu.umd.cs.findbugs.detect.FindReturnRef.visit(FindReturnRef.java:119) At edu.umd.cs.findbugs.visitclass.BetterVisitor.visitCode(BetterVisitor.java:218) At edu.umd.cs.findbugs.visitclass.PreorderVisitor.visitCode(PreorderVisitor.java:243) At edu.umd.cs.findbugs.bcel.OpcodeStackDetector.visitCode(OpcodeStackDetector.java:65) At org.apache.bcel.classfile.Code.accept(Code.java:131) At edu.umd.cs.findbugs.visitclass.PreorderVisitor.doVisitMethod(PreorderVisitor.java:315) At edu.umd.cs.findbugs.visitclass.PreorderVisitor.visitJavaClass(PreorderVisitor.java:397) At org.apache.bcel.classfile.JavaClass.accept(JavaClass.java:213) At edu.umd.cs.findbugs.BytecodeScanningDetector.visitClassContext(BytecodeScanningDetector.java:38) At edu.umd.cs.findbugs.DetectorToDetector2Adapter.visitClass(DetectorToDetector2Adapter.java:76) At edu.umd.cs.findbugs.FindBugs2.lambda$analyzeApplication$1(FindBugs2.java:1108) At java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) At edu.umd.cs.findbugs.CurrentThreadExecutorService.execute(CurrentThreadExecutorService.java:86) At java.base/java.util.concurrent.AbstractExecutorService.invokeAll(AbstractExecutorService.java:247) At edu.umd.cs.findbugs.FindBugs2.analyzeApplication(FindBugs2.java:1118) At edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:309) At edu.umd.cs.findbugs.test.AnalysisRunner.run(AnalysisRunner.java:115) ``` </issue> Please generate test cases that check whether an implemented solution resolves the issue of the user (at the top, within <issue/> brackets). You may apply changes to several files. Apply as much reasoning as you please and see necessary. Make sure to implement only test cases and don't try to fix the issue itself. You are not allowed to read git history. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp