[154977] Want to try "additional bundles" in build.properties?
diff --git a/plugins/org.eclipse.jst.server.tomcat.ui/build.properties b/plugins/org.eclipse.jst.server.tomcat.ui/build.properties
index 9832134..3156ef5 100644
--- a/plugins/org.eclipse.jst.server.tomcat.ui/build.properties
+++ b/plugins/org.eclipse.jst.server.tomcat.ui/build.properties
@@ -18,3 +18,8 @@
                @dot/**,\
                temp.folder/**
 source.. = tomcatui/
+
+# debug core is not intended, so far, to be used directly by this plugin. 
+# See https://bugs.eclipse.org/bugs/show_bug.cgi?id=154977
+additional.bundles = org.eclipse.debug.core
+