when (val property = propertyResolver.resolvePropertyWrite(receiverKClass, dataProperty.name)) {
            is RuntimePropertyResolver.WriteResolution.ResolvedWrite -> property.setter.setValue(receiverInstance, value)
            RuntimePropertyResolver.WriteResolution.UnresolvedWrite -> error("cannot set property ${dataProperty.name} in the receiver class $receiverKClass")
        }
    }

    }

    def "throws decent error when private field is annotated as option and no setter declared"() {
        when:
        TaskOptionsGenerator.generate(new TestClass10(), reader).getAll()
        then:
        def e = thrown(OptionValidationException)
        e.message == "No setter for Option annotated field 'field' in class 'class org.gradle.api.internal.tasks.options.OptionReaderTest\$TestClass10'."
    }

		return err
	} else if match {
		return nil
	}

	// normalize the name to letters, digits, _ or $
	valid := true
	cleaned := strings.Map(func(r rune) rune {
		switch {
		case unicode.IsLetter(r):
			return 'a'
		case unicode.IsDigit(r):
			return '0'
		case r == '_', r == '$':
			return r
		default:
			valid = false
			return -1
		}
	}, name)

	if valid {

	res.tparams = orig.tparams
	res.targs = newTypeList(targs)
	return res
}

func (a *Alias) cleanup() {
	// Ensure a.actual is set before types are published,
	// so Unalias is a pure "getter", not a "setter".
	actual := Unalias(a)

	if actual == Typ[Invalid] {
		// We don't set a.actual to Typ[Invalid] during type checking,
		// as it may indicate that the RHS is not fully set up.
		a.actual = actual
	}

            }
            classDoc.classProperties.each { propertyDoc ->
                linkMetaData.addPropertyAccessorMethod(propertyDoc.name, propertyDoc.metaData.getter ?: propertyDoc.metaData.setter)
            }
        } catch (Exception e) {
            throw new DocGenerationException("Failed to generate documentation for class '$classDoc.name'.", e)
        }
    }

To fix this problem, you must remove the annotation, create a getter for the property you want to use and annotate the getter instead.

[[mutable_type_with_setter]]
== Mutable type with setter

This error indicates that a property of "mutable" type is also providing a setter.

            this.next = next;
        }

        @Override
        public void invoke(MethodInvocation method) throws Throwable {
            if (method.isGetter()) {
                if (properties.containsKey(method.getName())) {
                    method.setResult(properties.get(method.getName()));
                    return;
                }

                }
            }

            task copy(type: MyCopy) {
                inputDirectory = file("input")
                nonIncrementalInput = file("nonIncremental.txt")
                outputDirectory.${setter}(file("build/output"))
            }
        """
        def inputFilePath = "in/some/input.txt"
        def nonIncrementalInput = file("nonIncremental.txt")
        nonIncrementalInput.text = "original"

    if (isWindows()) {
      return; // TODO: b/136041958 - Running very slowly on Windows CI.
    }
    final CyclicBarrier barrier =
        new CyclicBarrier(
            6 // for the setter threads
                + 50 // for the listeners
                + 50 // for the blocking get threads,
                + 1); // for the main thread

            invalidPropertyNames.add(propertyName);
        } else {
            propDesc.setReadMethod(readMethod);
        }
    }

    /**
     * setterメソッドを準備します。
     *
     * @param writeMethod
     *            setterメソッド
     * @param propertyName
     *            プロパティ名
     */
    protected void setupWriteMethod(final Method writeMethod, final String propertyName) {