Bootstrap Icons don't show up in AUI Button

• Type: Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: 7.3.0 CE GA1
• Fix Version/s: None
• Component/s: Tag Libraries > Liferay AUI Taglibs, ~ [Archived] Alloy Portlet, ~[Archived] UI Taglibs
• Labels: None
• Fix Priority: 2

Bootstrap icons seem no longer to be usable in AUI Buttons as stated in documentation: https://docs.liferay.com/portal/7.0/taglibs/util-taglib/aui/button.html

While there were no issues in 7.2.x the icons simply don't show up in 7.3.x

 

Steps to reproduce:

Create a MVC portlet with to following content in a jsp file:

<aui:button id="iconButton" icon="icon-pencil"></aui:button>

 

Expected behavior:

A button with a pencil appears.

 

Actual behavior:

A small button with no icon appears.