step([$class: 'XUnitBuilder', tools: [[$class: 'XUnitDotNetTestType', pattern: '*results.xml']]])

java.lang.NullPointerException
at org.jenkinsci.plugins.xunit.XUnitBuilder.<init>(XUnitBuilder.java:65)
at org.jenkinsci.plugins.xunit.XUnitBuilder.<init>(XUnitBuilder.java:71)
Caused: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.jenkinsci.plugins.structs.describable.DescribableModel.instantiate(DescribableModel.java:282)
Caused: java.lang.IllegalArgumentException: Could not instantiate {tools=[{$class=XUnitDotNetTestType}]} for XUnitBuilder(tools: TestType{AUnitJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | BoostTestJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | CTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | CUnitJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | CheckType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | CppTestJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | CppUnitJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | CustomType(pattern: String, customXSL: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | EmbUnitType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | FPCUnitJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | GTesterJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | GoogleTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | JUnitType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | MSTestJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | MbUnitType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | NUnitJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | PHPUnitJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | QTestLibType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | UnitTestJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | ValgrindJunitHudsonTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean) | XUnitDotNetTestType(pattern: String, skipNoTestFiles: boolean, failIfNotNew: boolean, deleteOutputFiles: boolean, stopProcessingIfError: boolean)}[], thresholds: XUnitThreshold{FailedThreshold(unstableThreshold: String, unstableNewThreshold: String, failureThreshold: String, failureNewThreshold: String) | SkippedThreshold(unstableThreshold: String, unstableNewThreshold: String, failureThreshold: String, failureNewThreshold: String)}[], thresholdMode: int, testTimeMargin: String)
at org.jenkinsci.plugins.structs.describable.DescribableModel.instantiate(DescribableModel.java:286)
at org.jenkinsci.plugins.structs.describable.DescribableModel.coerce(DescribableModel.java:402)
at org.jenkinsci.plugins.structs.describable.DescribableModel.buildArguments(DescribableModel.java:340)
at org.jenkinsci.plugins.structs.describable.DescribableModel.instantiate(DescribableModel.java:281)
at org.jenkinsci.plugins.workflow.steps.StepDescriptor.newInstance(StepDescriptor.java:201)
at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:208)
at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:153)
at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:122)
at sun.reflect.GeneratedMethodAccessor527.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:157)
at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:159)
at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:129)
at .....
Finished: FAILURE

step([$class: 'XUnitBuilder', thresholds: [[$class: 'FailedThreshold', unstableThreshold: '1']], tools: [[$class: 'XUnitDotNetTestType', pattern: '*results.xml']]])