Description

When a class has both a void method and a boolean isXxx() getter with related names, Beanshell 3.0.0-SNAPSHOT incorrectly invokes the property getter instead of the void method when calling xxx().

Example

    public interface Shutter {
        void up();           // Method I want to call
        boolean isUp();      // Getter for "up" property
    
        void down();         // This works correctly
        boolean isDown();    // Getter for "down" property
    }

The issue appears to be in bsh/Reflect.java:

invokeObjectMethod() (around line 54-80) attempts to resolve the method with resolveExpectedJavaMethod()
When this fails or in certain code paths, it falls back to property resolution
getObjectProperty() (around line 500-530) uses BshClassManager.memberCache.get(cls).findGetter(propName)
findGetter() matches the JavaBeans pattern and finds isUp() for property "up"
The property getter is invoked instead of the actual method