[GROOVY-8875] NullObject.metaClass

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0-alpha-3
• Assignee: Eric Milles
• Reporter: Pruteanu Dragos
• Created: 12/Nov/18 09:34
• Updated: 22/Dec/23 11:38
• Resolved: 17/Oct/23 22:20

Description

Hi,

I execute this. The third shell.evaluate throws an exception:

final GroovyShell shell = new GroovyShell( binding, FormsGroovyConfiguration.CONFIG );
// THIS WILL FORCE NULL VARIABLES TO PRINT AS '' INSTEAD OF NULL
// http://stackoverflow.com/questions/10517817/how-to-get-rid-of-null-when-concating-string-in-groovy
shell.evaluate("org.codehaus.groovy.runtime.NullObject.metaClass.toString = { return '' }");

And got the next exception. This used to work in Java 10 and before, it crashes under Java 11. Could have something to do with java modules ?

Exception in thread "JavaFX Application Thread" BUG! exception in phase 'semantic analysis' in source unit 'Script1.groovy' null
 at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:970)
 at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:633)
 at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:582)
 at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:324)
 at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:294)
 at groovy.lang.GroovyShell.parseClass(GroovyShell.java:558)
 at groovy.lang.GroovyShell.parse(GroovyShell.java:570)
 at groovy.lang.GroovyShell.evaluate(GroovyShell.java:454)
 at groovy.lang.GroovyShell.evaluate(GroovyShell.java:493)
 at groovy.lang.GroovyShell.evaluate(GroovyShell.java:464)