Excellent! Spent hours searching for this.

Nemanja · October 31, 2018, 10:03am

Nemanja · November 20, 2018, 9:41am

Widgetset compiling failed for Vaadin 8.6.1

Using com.vaadin:vaadin-client-compiler version 8.6.1
[INFO]
Compiling module AppWidgetset
[INFO]
Tracing compile failure path for type ‘com.vaadin.contextmenu.client.MyVOverlay’
[INFO]
[ERROR]
Errors in ‘jar:file:/Users/nemanja/.m2/repository/com/vaadin/ext-context-menu/0.2/ext-context-menu-0.2.jar!/com/vaadin/contextmenu/client/MyVOverlay.java’
[INFO]
[ERROR]
Line 22: This static method cannot hide the instance method from VOverlay
[INFO]
[ERROR]
Aborting compile due to errors in some input files

ollit.1 · November 20, 2018, 1:14pm

Sounds like there are some incompabilities with later Vaadin 8 releases, probably introduced somewhere around 8.4 or so when ContextMenu was refactored.