The value of this property is derived from:
  - extension 'custom2' property 'source'
  - extension 'custom1' property 'source'""")
    }

    def "can use property with no value as optional ad hoc task input property"() {
        given:
        buildFile << """

def prop = project.objects.property(String)

task thing {

            <la:form action="/admin/scheduler/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2}">
                    <la:hidden property="id"/>
                    <la:hidden property="versionNo"/>
                </c:if>
                <la:hidden property="createdBy"/>
                <la:hidden property="createdTime"/>
                <div class="row">

Method <org.gradle.api.artifacts.DependencyArtifact.getExtension()> does not have raw return type assignable to org.gradle.api.provider.Property in (DependencyArtifact.java:0)
Method <org.gradle.api.artifacts.DependencyArtifact.getName()> does not have raw return type assignable to org.gradle.api.provider.Property in (DependencyArtifact.java:0)

            warning(unsupportedValueTypeConfig { type('MyTask').property('nestedBean.nestedInput').propertyType('Property<URL>') }, "validation_problems", "unsupported_value_type"),
            warning(unsupportedValueTypeConfig { type('MyTask').property('propertyInput').propertyType('Property<URL>') }, "validation_problems", "unsupported_value_type"),

    private final Property<Boolean> server;
    private final Property<Boolean> suspend;

    @Inject
    public DefaultJavaDebugOptions(ObjectFactory objectFactory) {
        this.enabled = objectFactory.property(Boolean.class).convention(false);
        this.host = objectFactory.property(String.class);
        this.port = objectFactory.property(Integer.class).convention(5005);
        this.server = objectFactory.property(Boolean.class).convention(true);

            <la:form action="/admin/labeltype/">
                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2}">
                    <la:hidden property="id"/>
                    <la:hidden property="versionNo"/>
                </c:if>
                <la:hidden property="createdBy"/>
                <la:hidden property="createdTime"/>
                <div class="row">

    void insert(K key, V value);

    /**
     * Adds a map entry to the property value.
     *
     * <p>The given provider will be queried when the value of this property is queried.
     * <p>
     * When invoked on a property with no value, this method first sets the value
     * of the property to its current convention value, if set, or an empty map.
     * </p>

            contextualLabel == "Type \'MyTask\' property \'options.nestedThing\' is annotated with invalid property type @$ann.simpleName"
            details == "The '@${ann.simpleName}' annotation cannot be used in this context"
            solutions == [
                'Remove the property',

                    "java/com/example/Task.java",
                    """
                        package com.example;
                        import org.gradle.api.provider.Property;

                        public abstract class Task {
                            public abstract Property<String> getSourceCompatibility();
                        }
                    """
                )
            }
        ) {
            assertHasErrors(

                <la:hidden property="crudMode"/>
                <c:if test="${crudMode==2 || crudMode==3 || crudMode==4}">
                    <la:hidden property="id"/>
                    <la:hidden property="versionNo"/>
                </c:if>
                <la:hidden property="createdBy"/>
                <la:hidden property="createdTime"/>
                <la:hidden property="sortOrder"/>
                <div class="row">