[GROOVY-5007] Inscrutable error message on missing comma

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: syntax
• Environment: Debian Testing, Groovy HEAD a4bf2c97e62c687e2becabc09547cfe49bbc2603
• Assignee: Unassigned
• Reporter: Dr. Russel Winder
• Created: 10/Sep/11 01:54
• Updated: 25/Nov/13 06:37

Description

The code:

def task ( name , block ) { print name ; block ( ) }
task 'hello' , { println ' calling . . . ' }

compiles and runs fine in GroovyConsole. However missing the comma in the call:

task 'hello' { println ' calling . . . ' }

leads to the error message:

groovy.lang.MissingPropertyException: No such property: task for class: ConsoleScript2
Possible solutions: class
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:50)
at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:231)
at ConsoleScript2.run(ConsoleScript2:2)
at groovy.lang.GroovyShell.runScriptOrMainOrTestOrRunnable(GroovyShell.java:255)
at groovy.lang.GroovyShell.run(GroovyShell.java:506)
at groovy.lang.GroovyShell.run(GroovyShell.java:161)
at groovy.lang.GroovyShell$run.call(Unknown Source)
at groovy.ui.Console$_runScriptImpl_closure16.doCall(Console.groovy:924)
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:882)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
at groovy.ui.Console$_runScriptImpl_closure16.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:882)
at groovy.lang.Closure.call(Closure.java:410)
at groovy.lang.Closure.call(Closure.java:404)
at groovy.lang.Closure.run(Closure.java:488)
at java.lang.Thread.run(Thread.java:662)

groovy.lang.MissingPropertyException: No such property: task for class: ConsoleScript2
Possible solutions: class
at ConsoleScript2.run(ConsoleScript2:2)

which really gives no indication at all to the programmer what has gone wrong. The error message is far too related to the parse of the line and unrelated to the programmers original source code.