[GROOVY-1026] Null argument to methods with vararg parameters are replaced with array of length 1

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.0-JSR-4
• Fix Version/s: 1.0-JSR-4
• Assignee: Kim, Pilho
• Reporter: Hein Meling
• Created: 22/Aug/05 06:47
• Updated: 23/Aug/22 17:16
• Resolved: 23/Aug/05 02:46

Description

This code now fails:

package groovy.bugs;
import java.lang.reflect.*
class ReflectionInvokeBug extends GroovyTestCase {
void testInvoke()

{ def clazz = "org.codehaus.groovy.dummy.ClassWithStaticMethod" Class c = Class.forName(clazz) Method init = c.getDeclaredMethod("staticMethod", null) }

}

with this exception:

[java] There was 1 error:
[java] 1) testInvoke(groovy.bugs.ReflectionInvokeBug)java.lang.ClassCastException: [Ljava.lang.Object;
[java] at gjdk.java.lang.Class_GroovyReflector.invoke(Unknown Source)
[java] at groovy.lang.MetaMethod.invoke(MetaMethod.java:110)
[java] at groovy.lang.MetaClass.doMethodInvoke(MetaClass.java:1557)
[java] at groovy.lang.MetaClass.invokeStaticMethod(MetaClass.java:520)
[java] at org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:137)
[java] at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:104)
[java] at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethod(ScriptBytecodeAdapter.java:85)
[java] at groovy.bugs.ReflectionInvokeBug.testInvoke(Unknown Source)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[java] at groovy.util.GroovyTestSuite.main(GroovyTestSuite.java:79)
[java]

This must be due to some recent change since I upgraded today and it worked before.

Issue Links

• depends upon: GROOVY-1023 methods with varargs are called with null when args are empty but should use an empty Array
• relates to: GROOVY-6146 Calling a Java vararg method from Groovy with a null argument cast to the vararg type behaves differently than in Java
• relates to: GROOVY-10099 A single null argument to a varargs parameter is received as null