EXEC: Open New application wizard. EXEC: Choose any basic cartridge and click Next. EXEC: Fill in application details and click Next EXEC: Uncheck Create a new project. ASSERT: error decoration shows up in the upper left corner of the text field for the project name ("Use existing project") EXEC: move your mouse over the error decoration RESULT: two overlapping tooltips show up (the tool tip for the autocomplete and the tooltip for the error). Furthermore the error decorator hides the decoration for content assist. You only see the error decoration.