[GROOVY-11027] Boolean isProperty() method does not create synthetic Boolean property

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 4.0.9, 4.0.10, 4.0.11
• Component/s: Compiler
• Assignee: Unassigned
• Reporter: Jason Garrett
• Created: 26/Apr/23 19:03
• Updated: 22/Dec/23 11:38
• Resolved: 26/Apr/23 21:14

Description

A class that defines a Boolean (object, not primitive) method isMyProperty() does not have the corresponding synthetic Boolean property.

The main method of this class:

class SyntheticBooleanProperty {
    Boolean isMyProperty() {
       return null
    }

    static void main(args) {
       assert (new SyntheticBooleanProperty()).myProperty == null
    }
} 

Fails with a MissingPropertyException:

Exception in thread "main" groovy.lang.MissingPropertyException: No such property: myProperty for class: SyntheticBooleanProperty
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:67)
    at org.codehaus.groovy.vmplugin.v8.IndyGuardsFiltersAndSignatures.unwrap(IndyGuardsFiltersAndSignatures.java:161)
    at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:321)
    at SyntheticBooleanProperty.main(SyntheticBooleanProperty.groovy:7) 

This does not happen if the method's return type is (primitive) boolean.  It can be worked around by adding a Boolean getMyProperty() method.

This happens with and without CompileStatic, and goes back at least as far as version 4.0.9.

Here is a live demo.