Martin Jobst

There is a logged NPE in the constructor of `ViewerUpdateMonitor` when `viewerInput` is `null`. This can happen sporadically when updating tree elements during `Viewer.setInput(null)`. This PR adds a check to...

Logged NPE in ViewerUpdateMonitor constructor

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There is a logged NPE due to `viewerInput` being `null` in the constructor of `ViewerUpdateMonitor` when updating tree elements during `Viewer.setInput(null)`: https://github.com/eclipse-platform/eclipse.platform/blob/b469dee78f959320d018d3607d74fc24da69f7cd/debug/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/model/ViewerUpdateMonitor.java#L86-L91 The problem originally occurred when watching a variable...

We at [Eclipse 4diac](https://eclipse.dev/4diac/) are using a text editor tab inside a multi-page editor for text documents embedded inside XML files. The plain-text content is extracted out of the larger...