Form will submit on a required hidden input

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.2.10 DXP FP8, 7.2.10.3 DXP SP3, 7.2.X, 7.3.5 CE GA6, 7.3.10 DXP GA1, Master
• Component/s: Alloy UI
• Labels:
  • ee-ts
  • liferay-dxp-72-sp3
  • liferay-fixpack-dxp-8-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 3

Reproduction steps:

1) Compile and deploy the attached portlet with the below code in view.jsp:

<portlet:resourceURL var="captchaURL" />
<liferay-ui:error key="submitError"  message="Hello" />
<p>
   <b>
      <liferay-ui:message key="TestPortlet.caption"/>
   </b>
   <portlet:actionURL name="requestCandidateInformation" var="requestCandidateInformationURL" />
</p>
<%
   String requestCandidateInformationUrl = requestCandidateInformationURL.toString(); 
   %>
<aui:form action="<%=requestCandidateInformationUrl %>" method="post" name="fm">
   <aui:input name="firstName" label="lr_requesCandInfoFrstName" type="text" placeholder="lr_requesCandInfoFrstName" required="true"/>
   <aui:input name="firstNameHidden" label="lr_requesCandInfoFrstName" type="hidden" placeholder="lr_requesCandInfoFrstName" required="true" />
   <aui:button cssClass="btn-lg search-btn" tfronype="submit" value="lr_candidateDescRequestInfoButtonLabel" />
</aui:form>

2) Place the portlet on a page
3) Fill the visible field
4) Submit the form

Expected behavior:
Submission to stop, required validation to fire.

Actual behavior:
The required validation won't fire, the form will be submitted successfully.