jengebr commented on code in PR #842:
URL: https://github.com/apache/tomcat/pull/842#discussion_r2046912039


##########
java/org/apache/jasper/runtime/JspRuntimeLibrary.java:
##########
@@ -957,4 +957,21 @@ public static void releaseTag(Tag tag, InstanceManager 
instanceManager) {
         }
 
     }
+
+    public static void nonstandardSetTag(jakarta.servlet.jsp.PageContext 
pageContext, String var, Object value) {
+        if (value == null) {
+            pageContext.removeAttribute(var);
+        } else {
+            pageContext.setAttribute(var, value);
+        }
+    }
+

Review Comment:
   I verified this by comparison to the JSTL tag and realized I missed some 
logic to clean up the VariableMapper.  I added that as well.



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