Bug 550845

Summary:	widget disposed in StyledText
Product:	[Eclipse Project] Platform	Reporter:	Daniel Migowski <dmigowski>
Component:	SWT	Assignee:	Platform-SWT-Inbox <platform-swt-inbox>
Status:	NEW ---	QA Contact:
Severity:	normal
Priority:	P3
Version:	4.13
Target Milestone:	---
Hardware:	PC
OS:	Windows 10
Whiteboard:

Description Daniel Migowski

2019-09-06 09:00:10 EDT

I get the following stack trace in Eclipse 4.6.2:

org.eclipse.swt.SWTException: Widget is disposed
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.widgets.Widget.error(Unknown Source)
    at org.eclipse.swt.widgets.Widget.checkWidget(Unknown Source)
    at org.eclipse.swt.widgets.Widget.isListening(Unknown Source)
    at org.eclipse.swt.custom.StyledText.modifyContent(Unknown Source)
    at org.eclipse.swt.custom.StyledText.sendKeyEvent(Unknown Source)
    at org.eclipse.swt.custom.StyledText.doContent(Unknown Source)
    at org.eclipse.swt.custom.StyledText.handleKey(Unknown Source)
    at org.eclipse.swt.custom.StyledText.handleKeyDown(Unknown Source)
    at org.eclipse.swt.custom.StyledText$7.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.wmChar(Unknown Source)
    at org.eclipse.swt.widgets.Control.WM_CHAR(Unknown Source)
    at org.eclipse.swt.widgets.Canvas.WM_CHAR(Unknown Source)
    at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
    at org.eclipse.swt.widgets.Canvas.windowProc(Unknown Source)
    at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
    at org.eclipse.swt.widgets.HookableDisplay.windowProc(HookableDisplay.java:56)
    at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
    at org.eclipse.swt.internal.win32.OS.DispatchMessage(Unknown Source)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
    at de.ikoffice.gui.MainWindow.open(MainWindow.java:1824)

I checked the latest version and there has no widget-disposed-checking been added since my version, so I believe the bug should occur also on later and earlier versions.

I kindly request to add some error checking here.