java.lang.NullPointerException: Cannot invoke method next() on null object

Apache's JIRA Issue Tracker | andrii ievdokimov | 4 years ago
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    The following code throws java.lang.NullPointerException: Cannot invoke method next() on null object {code} int x [1..10].each{ x++ } {code} Expected result: X should be increased in each step. Stacktrace for code: java.lang.NullPointerException: Cannot invoke method next() on null object at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:77) at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:45) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45) at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:32) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112) at ConsoleScript18$_run_closure1.doCall(ConsoleScript18:3) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233) at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:909) at groovy.lang.Closure.call(Closure.java:411) at groovy.lang.Closure.call(Closure.java:427) at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:1325) at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:1297) at org.codehaus.groovy.runtime.dgm$148.invoke(Unknown Source) at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:271) at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:53) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) at ConsoleScript18.run(ConsoleScript18:2) at groovy.lang.GroovyShell.runScriptOrMainOrTestOrRunnable(GroovyShell.java:257) at groovy.lang.GroovyShell.run(GroovyShell.java:481) at groovy.lang.GroovyShell.run(GroovyShell.java:163) at groovy.lang.GroovyShell$run.call(Unknown Source) at groovy.ui.Console$_runScriptImpl_closure17.doCall(Console.groovy:951) at groovy.ui.Console$_runScriptImpl_closure17.doCall(Console.groovy) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233) at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:909) at groovy.lang.Closure.call(Closure.java:411) at groovy.lang.Closure.call(Closure.java:405) at groovy.lang.Closure.run(Closure.java:492) at java.lang.Thread.run(Thread.java:662) java.lang.NullPointerException: Cannot invoke method next() on null object at ConsoleScript18$_run_closure1.doCall(ConsoleScript18:3) at ConsoleScript18.run(ConsoleScript18:2)

    Apache's JIRA Issue Tracker | 4 years ago | andrii ievdokimov
    java.lang.NullPointerException: Cannot invoke method next() on null object

    Root Cause Analysis

    1. java.lang.NullPointerException

      Cannot invoke method next() on null object

      at ConsoleScript18$_run_closure1.doCall()
    2. Unknown
      ConsoleScript18.run
      1. ConsoleScript18$_run_closure1.doCall(ConsoleScript18:3)
      2. ConsoleScript18.run(ConsoleScript18:2)
      2 frames