Unhandled exception in script

Hi Professors,

I was trying to run some experiment with defects4j's major mutation testing framework and I have observed some wierd cases. For example, when applying the below mutant as patch, defects4j test should report failing tests but it crashed!

diff --git a/src/main/java/com/fasterxml/jackson/databind/ser/std/ObjectArraySerializer.java b/src/main/java/com/fasterxml/jackson/databind/ser/std/ObjectArraySerializer.java
index 894bfc3b6..d342cd416 100644
--- a/src/main/java/com/fasterxml/jackson/databind/ser/std/ObjectArraySerializer.java
+++ b/src/main/java/com/fasterxml/jackson/databind/ser/std/ObjectArraySerializer.java
@@ -288,7 +288,7 @@ public class ObjectArraySerializer
     {
         final int len = value.length;
         final TypeSerializer typeSer = _valueTypeSerializer;
-        int i = 0;
+        int i = -1;
         Object elem = null;
         try {
             PropertySerializerMap serializers = _dynamicSerializers;

How to reproduce: env: latest defects4j version & Java 8

defects4j checkout -p JacksonDatabind -v 1f -w JacksonDatabind_1f

// apply the mutant patch above

defects4j test

Error message:

run.dev.tests: [junit] Running com.fasterxml.jackson.databind.TestFormatSchema [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.01 sec [junit] Running com.fasterxml.jackson.databind.TestGeneratorUsingMapper [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.018 sec [junit] Running com.fasterxml.jackson.databind.TestHandlerInstantiation [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.041 sec [junit] Running com.fasterxml.jackson.databind.TestJDKSerialization [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.136 sec [junit] Running com.fasterxml.jackson.databind.TestNamingStrategy [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.048 sec [junit] Running com.fasterxml.jackson.databind.TestObjectMapper [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.021 sec [junit] Running com.fasterxml.jackson.databind.TestObjectMapperBeanDeserializer [junit] Tests run: 9, Failures: 0, Errors: 0, Time elapsed: 0.038 sec [junit] Running com.fasterxml.jackson.databind.TestObjectMapperBeanSerializer [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.066 sec [junit] Running com.fasterxml.jackson.databind.TestParserUsingMapper [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.057 sec [junit] Running com.fasterxml.jackson.databind.TestReadValues [junit] Tests run: 10, Failures: 0, Errors: 0, Time elapsed: 0.051 sec [junit] Running com.fasterxml.jackson.databind.TestRootName [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.028 sec [junit] Running com.fasterxml.jackson.databind.TestStdDateFormat [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.001 sec [junit] Running com.fasterxml.jackson.databind.TestStdNamingStrategies [junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 0.027 sec [junit] Running com.fasterxml.jackson.databind.TestVersions [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.036 sec [junit] Running com.fasterxml.jackson.databind.access.TestSerAnyGetter [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.033 sec [junit] Running com.fasterxml.jackson.databind.contextual.TestContextualDeserialization [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.031 sec [junit] Running com.fasterxml.jackson.databind.contextual.TestContextualKeyTypes [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.029 sec [junit] Running com.fasterxml.jackson.databind.contextual.TestContextualSerialization [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.019 sec [junit] Running com.fasterxml.jackson.databind.contextual.TestContextualWithAnnDeserializer [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.014 sec [junit] Running com.fasterxml.jackson.databind.convert.TestArrayConversions [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.024 sec [junit] Running com.fasterxml.jackson.databind.convert.TestBeanConversions [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.03 sec [junit] Running com.fasterxml.jackson.databind.convert.TestConvertingDeserializer [junit] Tests run: 8, Failures: 0, Errors: 0, Time elapsed: 0.025 sec [junit] Running com.fasterxml.jackson.databind.convert.TestConvertingSerializer [junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 0.026 sec [junit] Running com.fasterxml.jackson.databind.convert.TestMapConversions [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.028 sec [junit] Running com.fasterxml.jackson.databind.convert.TestPolymorphicUpdateValue [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.017 sec [junit] Running com.fasterxml.jackson.databind.convert.TestStringConversions [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.019 sec [junit] Running com.fasterxml.jackson.databind.convert.TestUpdateValue [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.022 sec [junit] Running com.fasterxml.jackson.databind.creators.TestBuilderSimple [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.021 sec [junit] Running com.fasterxml.jackson.databind.creators.TestConstructFromMap [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.02 sec [junit] Running com.fasterxml.jackson.databind.creators.TestCreatorNullValue [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.013 sec [junit] Running com.fasterxml.jackson.databind.creators.TestCreators [junit] Tests run: 18, Failures: 0, Errors: 0, Time elapsed: 0.029 sec [junit] Running com.fasterxml.jackson.databind.creators.TestCreators2 [junit] Tests run: 11, Failures: 0, Errors: 0, Time elapsed: 0.029 sec [junit] Running com.fasterxml.jackson.databind.creators.TestCreatorsDelegating [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.015 sec [junit] Running com.fasterxml.jackson.databind.creators.TestPolymorphicCreators [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.03 sec [junit] Running com.fasterxml.jackson.databind.creators.TestValueInstantiator [junit] Tests run: 15, Failures: 0, Errors: 0, Time elapsed: 0.031 sec [junit] Running com.fasterxml.jackson.databind.deser.TestAbstract [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.009 sec [junit] Running com.fasterxml.jackson.databind.deser.TestAnnotationIgnore [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.015 sec [junit] Running com.fasterxml.jackson.databind.deser.TestAnnotationUsing [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.022 sec [junit] Running com.fasterxml.jackson.databind.deser.TestAnyProperties [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.025 sec [junit] Running com.fasterxml.jackson.databind.deser.TestArrayDeserialization [junit] Tests run: 19, Failures: 0, Errors: 0, Time elapsed: 0.121 sec [junit] Running com.fasterxml.jackson.databind.deser.TestAutoDetect [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.011 sec [junit] Running com.fasterxml.jackson.databind.deser.TestBasicAnnotations [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.018 sec [junit] Running com.fasterxml.jackson.databind.deser.TestBeanDeserializer [junit] Tests run: 9, Failures: 0, Errors: 0, Time elapsed: 0.027 sec [junit] Running com.fasterxml.jackson.databind.deser.TestBlocking [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.009 sec [junit] Running com.fasterxml.jackson.databind.deser.TestCollectionDeserialization [junit] Tests run: 9, Failures: 0, Errors: 0, Time elapsed: 0.033 sec [junit] Running com.fasterxml.jackson.databind.deser.TestConcurrency [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 2.016 sec [junit] Running com.fasterxml.jackson.databind.deser.TestConfig [junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 0.016 sec [junit] Running com.fasterxml.jackson.databind.deser.TestCustomDeserializers [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.036 sec [junit] Running com.fasterxml.jackson.databind.deser.TestCustomFactory [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.016 sec [junit] Running com.fasterxml.jackson.databind.deser.TestCyclicTypes [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.014 sec [junit] Running com.fasterxml.jackson.databind.deser.TestDateDeserialization [junit] Tests run: 17, Failures: 0, Errors: 0, Time elapsed: 0.034 sec [junit] Running com.fasterxml.jackson.databind.deser.TestEnumDeserialization [junit] Tests run: 20, Failures: 0, Errors: 0, Time elapsed: 0.042 sec [junit] Running com.fasterxml.jackson.databind.deser.TestExceptionDeserialization [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.048 sec [junit] Running com.fasterxml.jackson.databind.deser.TestExceptionHandling [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.015 sec [junit] Running com.fasterxml.jackson.databind.deser.TestFieldDeserialization [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.033 sec [junit] Running com.fasterxml.jackson.databind.deser.TestGenericCollectionDeser [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.027 sec [junit] Running com.fasterxml.jackson.databind.deser.TestGenericMapDeser [junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 0.031 sec [junit] Running com.fasterxml.jackson.databind.deser.TestGenericNumber [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.021 sec [junit] Running com.fasterxml.jackson.databind.deser.TestGenerics [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.019 sec [junit] Running com.fasterxml.jackson.databind.deser.TestGenericsBounded [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.032 sec [junit] Running com.fasterxml.jackson.databind.deser.TestIgnoredTypes [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.015 sec [junit] Running com.fasterxml.jackson.databind.deser.TestInjectables [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.019 sec [junit] Running com.fasterxml.jackson.databind.deser.TestInnerClass [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.02 sec [junit] Running com.fasterxml.jackson.databind.deser.TestJacksonTypes [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.047 sec [junit] Running com.fasterxml.jackson.databind.deser.TestJdkTypes [junit] Tests run: 15, Failures: 0, Errors: 0, Time elapsed: 0.064 sec [junit] Running com.fasterxml.jackson.databind.deser.TestMapDeserialization [junit] Tests run: 21, Failures: 0, Errors: 0, Time elapsed: 0.071 sec [junit] Running com.fasterxml.jackson.databind.deser.TestNullHandling [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.005 sec [junit] Running com.fasterxml.jackson.databind.deser.TestNumbers [junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 0.037 sec [junit] Running com.fasterxml.jackson.databind.deser.TestOverloaded [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.022 sec [junit] Running com.fasterxml.jackson.databind.deser.TestParentChildReferences [junit] Tests run: 9, Failures: 0, Errors: 0, Time elapsed: 0.068 sec [junit] Running com.fasterxml.jackson.databind.deser.TestSetterlessProperties [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.036 sec [junit] Running com.fasterxml.jackson.databind.deser.TestSimpleAtomicTypes [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.019 sec [junit] Running com.fasterxml.jackson.databind.deser.TestSimpleTypes [junit] Tests run: 24, Failures: 0, Errors: 0, Time elapsed: 0.053 sec [junit] Running com.fasterxml.jackson.databind.deser.TestStatics [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.015 sec [junit] Running com.fasterxml.jackson.databind.deser.TestTimestampDeserialization [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.01 sec [junit] Running com.fasterxml.jackson.databind.deser.TestUntypedDeserialization [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.061 sec [junit] Running com.fasterxml.jackson.databind.deser.TestValueAnnotations [junit] Tests run: 13, Failures: 0, Errors: 0, Time elapsed: 0.092 sec [junit] Running com.fasterxml.jackson.databind.ext.TestCoreXMLTypes [junit] Tests run: 7, Failures: 0, Errors: 0, Time elapsed: 0.042 sec [junit] Running com.fasterxml.jackson.databind.ext.TestDOM [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.044 sec [junit] Running com.fasterxml.jackson.databind.filter.TestIgnorePropsForSerialization [junit] Tests run: 5, Failures: 0, Errors: 0, Time elapsed: 0.041 sec [junit] Running com.fasterxml.jackson.databind.filter.TestSimpleSerializationIgnore [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.044 sec [junit] Running com.fasterxml.jackson.databind.filter.TestUnknownPropertyDeserialization [junit] Tests run: 11, Failures: 0, Errors: 0, Time elapsed: 0.024 sec [junit] Running com.fasterxml.jackson.databind.interop.TestCglibUsage [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.076 sec [junit] Running com.fasterxml.jackson.databind.interop.TestExternalizable [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.029 sec [junit] Running com.fasterxml.jackson.databind.interop.TestFormatDetection [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.015 sec [junit] Running com.fasterxml.jackson.databind.interop.TestGroovyBeans [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.232 sec [junit] Running com.fasterxml.jackson.databind.interop.TestHibernate [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0 sec [junit] Running com.fasterxml.jackson.databind.interop.TestJDKProxy [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.02 sec [junit] Running com.fasterxml.jackson.databind.introspect.TestAnnotationMerging [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.036 sec [junit] Running com.fasterxml.jackson.databind.introspect.TestAnnotionBundles [junit] Tests run: 3, Failures: 0, Errors: 0, Time elapsed: 0.02 sec [junit] Running com.fasterxml.jackson.databind.introspect.TestBuilderMethods [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.004 sec [junit] Running com.fasterxml.jackson.databind.introspect.TestInferredMutators [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.018 sec [junit] Running com.fasterxml.jackson.databind.introspect.TestJacksonAnnotationIntrospector [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 0.036 sec [junit] Running com.fasterxml.jackson.databind.introspect.TestPOJOPropertiesCollector [junit] Tests run: 16, Failures: 0, Errors: 0, Time elapsed: 0.02 sec [junit] Running com.fasterxml.jackson.databind.jsonschema.TestGenerateJsonSchema [junit] Tests run: 6, Failures: 0, Errors: 0, Time elapsed: 0.036 sec [junit] Running com.fasterxml.jackson.databind.jsonschema.TestReadJsonSchema [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.032 sec [junit] Running com.fasterxml.jackson.databind.jsontype.TestAbstractTypeNames [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.04 sec [junit] Running com.fasterxml.jackson.databind.jsontype.TestAbstractWithObjectId [junit] deserialised list size = 2 [junit] Tests run: 1, Failures: 0, Errors: 0, Time elapsed: 0.037 sec [junit] Running com.fasterxml.jackson.databind.jsontype.TestCustomTypeIdResolver

BUILD FAILED /home/jun/tools/defects4j/framework/projects/defects4j.build.xml:107: java.lang.NullPointerException at com.fasterxml.jackson.databind.JsonMappingException$Reference.toString(JsonMappingException.java:97) at com.fasterxml.jackson.databind.JsonMappingException._appendPathDesc(JsonMappingException.java:364) at com.fasterxml.jackson.databind.JsonMappingException.getPathReference(JsonMappingException.java:267) at com.fasterxml.jackson.databind.JsonMappingException._buildMessage(JsonMappingException.java:340) at com.fasterxml.jackson.databind.JsonMappingException.getMessage(JsonMappingException.java:321) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.addError(JUnitTestRunner.java:645) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner$3.addError(JUnitTestRunner.java:1123) at junit.framework.TestResult.addError(TestResult.java:39) at junit.framework.TestResult.runProtected(TestResult.java:148) at junit.framework.TestResult.run(TestResult.java:125) at junit.framework.TestCase.run(TestCase.java:129) at junit.framework.TestSuite.runTest(TestSuite.java:255) at junit.framework.TestSuite.run(TestSuite.java:250) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:520) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(JUnitTask.java:1484) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:872) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeOrQueue(JUnitTask.java:1972) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute1(JUnitTask.java:824) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:2277) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:392) at org.apache.tools.ant.Target.performTasks(Target.java:413) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399) at org.apache.tools.ant.Project.executeTarget(Project.java:1368) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1251) at org.apache.tools.ant.Main.runBuild(Main.java:811) at org.apache.tools.ant.Main.startAnt(Main.java:217) at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280) at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)

Total time: 9 seconds Cannot run tests! at /home/jun/tools/defects4j/framework/bin/d4j/d4j-test line 135. Compilation failed in require at /home/jun/tools/defects4j/framework/bin/defects4j line 204.

I think it's very likely that there's something wrong with the exception handling module of defects4j because normaly it will safely exit with reporting some failing tests. But currently I can not figure out where the bug is. Thank you for reading this issue!

rjust / defects4j

Unhandled exception in script #489