Plone 5.2.2 regression with schema.URI-based fields?

Hi folks:

I have a Dexterity type with this field:

rdfDataSources = schema.List(
    title=_(u'RDF Data Sources'),
    description=_(u'URLs to sources of Resource Description Format (RDF) data.'),
        title=_(u'RDF Data Source'),
        description=_(u'URL to a source of Resource Description Format data that mandates the contents of this folder.'),

After upgrading to Plone 5.2.2, when people edit an instance of this custom type, they're now getting a stack trace:

TypeError: 'int' object is not callable

 - Expression: "et python:view.key_widgets[repeat['widget'].index"
 - Filename:   ... 2.1-py2.7.egg/plone/app/z3cform/templates/
 - Location:   (line 7: col 33)
 - Source:     ... ey_widget python:view.key_widgets[repeat['widget'].index()];
 - Expression: "widget/render"
 - Filename:   ... rm-3.2.1-py2.7.egg/plone/app/z3cform/templates/
 - Location:   (line 39: col 46)
 - Source:     ... xt" tal:replace="structure widget/render"
 - Expression: "widget/@@ploneform-render-widget"
 - Filename:   ... rm-3.2.1-py2.7.egg/plone/app/z3cform/templates/
 - Location:   (line 99: col 81)
 - Source:     ... place="structure widget/@@ploneform-render-widget"/>
 - Expression: "context/@@ploneform-macros/titlelessform"
 - Filename:   ... 1.3-py2.7.egg/plone/z3cform/pagetemplates/
 - Location:   (line 1: col 22)
 - Source:     ... e use-macro="context/@@ploneform-macros/titlelessform" />
 - Arguments:  widget: <URIWidget 'form.widgets.rdfDataSources.0'>
               repeat: <Products.PageTemplates.engine.RepeatDictWrapper object at 0x111b87d70>
               context: <Container at /edrn/publications>
               views: <zope.browserpage.viewpagetemplatefile.ViewMapper object at 0x112913890>
               modules: <zope.pagetemplate.engine.TraversableModuleImporter object at 0x10eb21090>
               args: ()
               attrs: {}
               nothing: None
               target_language: None
               default: <DEFAULT>
               request: <WSGIRequest, URL=http://localhost:6468/edrn/publications/@@edit>
               loop: {u'widget': <Products.PageTemplates.engine.RepeatItem object at 0x1152818d0>}
               template: <zope.browserpage.viewpagetemplatefile.ViewPageTemplateFile object at 0x1121cedd0>
               translate: <function translate at 0x11529b230>
               options: {}
               view: <MultiWidget 'form.widgets.rdfDataSources'>

Changing the value_type in the schema.List to schema.TextLine is a workaround—although the user interface presented isn't quite the same :unamused:

:thinking: Curiously, bare schema.URI fields work fine:

subjectURI = schema.URI(
    title=_(u'Subject URI Prefix'),
    description=_(u'RDF subject Uniform Resource Identifier to prefix for objects described here.'),

but inside a list, forget about it! :open_mouth:

Have I been doing schema.Lists wrong? Is Plone 5.2.2 enforcing something I've been skating under the radar with for some time? Or is this maybe a teensy little regression? :smirk:

Thanks! :pray:

upgrade package to 3.2.2. this is fixed in the package

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