[GROOVY-6186] Cannot invoke method next() on varible, which is initialized by default, in each\eachWithIndex

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.1.3
• Fix Version/s: 2.2.1
• Component/s: primtive opts
• Assignee: Jochen Theodorou
• Reporter: andrii ievdokimov
• Created: 30/May/13 04:49
• Updated: 15/Oct/15 18:20
• Resolved: 26/Nov/13 06:29

Description

The following code throws java.lang.NullPointerException: Cannot invoke method next() on null object

int x 
[1..10].each{
x++
}

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)