[GROOVY-3798] Incorrect generated bytecode (duplicate field and method) on service with multiple methods returning array of same type

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.6.4, 1.7-beta-1
• Fix Version/s: 1.6.5, 1.7-beta-2
• Assignee: Jochen Theodorou
• Reporter: Rich Seagraves
• Created: 15/Jul/09 11:03
• Updated: 30/Sep/09 07:27
• Resolved: 30/Sep/09 07:27

Description

Grails 1.1.1, Groovy 1.6.3

To reproduce:

1. Create a new empty project
2. Create the following class in src/java:

package a;
public class A {

}

3. Create the following service in grails-app/services:

package b;
import a.A;
public class BService {
public A[] m1()

{ return null; }

public A[] m2()

{ return null; }

}

4. Run grails run-app
The following exception will be thrown on startup:
java.lang.ClassFormatError: Duplicate field name&signature in class file b/BService
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:300)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.security.AccessController.doPrivileged(Native Method)
at grails.web.container.EmbeddableServer$start.call(Unknown Source)
at _GrailsRun_groovy$_run_closure5_closure11.doCall(_GrailsRun_groovy:145)
at _GrailsRun_groovy$_run_closure5_closure11.doCall(_GrailsRun_groovy)
at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:274)
at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:137)
at _GrailsRun_groovy$_run_closure5.call(_GrailsRun_groovy)
at _GrailsRun_groovy.runInline(_GrailsRun_groovy:104)
at _GrailsRun_groovy.this$4$runInline(_GrailsRun_groovy)
at _GrailsRun_groovy$_run_closure1.doCall(_GrailsRun_groovy:58)
at RunApp$_run_closure1.doCall(RunApp:33)
at gant.Gant$_dispatch_closure4.doCall(Gant.groovy:324)
at gant.Gant$_dispatch_closure6.doCall(Gant.groovy:334)
at gant.Gant$_dispatch_closure6.doCall(Gant.groovy)
at gant.Gant.withBuildListeners(Gant.groovy:344)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant.dispatch(Gant.groovy:334)
at gant.Gant.this$2$dispatch(Gant.groovy)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.processTargets(Gant.groovy:495)
at gant.Gant.processTargets(Gant.groovy:480)

When inspecting the bytecode of B/BService.class with javap -private, you'll notice the following lines:
private static java.lang.Class array$$class$a$A;
private static java.lang.Class array$$class$a$A;
...
private static java.lang.Class $get$array$$class$a$A();
private static java.lang.Class $get$array$$class$a$A();

Note, when BService is manually compiled with groovyc, the generated bytecode is okay (only one field and method entry).