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If you contribute an editor via the org.eclipse.ui.editors extension point but don't specify an icon, the editor will not be shown as an option when defining a File Association. There's no requirement for an editor to provide an icon and this problem ("Why doesn't my editor show up?") is a mess to figure out.
This bug is also present in version 3.2.2
This bug is present in 3.3 as well. When an editor is declared without an icon, an error is logged that says "Required attribute 'icon' not defined" for that extension, and the editor is not loaded. Furthermore, the "editors.exsd" schema does not itself appear to mark the "icon" field as required, so the extension point editor doesn't annotate the field with an asterisk or throw up an error when the field is not filled in.
As per http://wiki.eclipse.org/Platform_UI/Bug_Triage_Change_2009
Remy is now responsible for watching the [EditorMgmt] component area.
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.
