Seeing a Null Pointer Exception when using Pixel Inspection Tool

[scuniff]

ImageJ 1.54f

Exception in thread "Pixel Inspector" java.lang.NullPointerException
at ij.plugin.tool.PixelInspector.addImageListeners(PixelInspectionTool.java:238)
at ij.plugin.tool.PixelInspector.writeNumbers(PixelInspectionTool.java:351)
at ij.plugin.tool.PixelInspector.run(PixelInspectionTool.java:330)
at java.lang.Thread.run(Thread.java:748)

Steps:

1. Open up Fiji
2. Select Pixel Inspection Tool on Toolbar
3. Open up File->Open Samples->Fluorecsnt Cells
4. Left click anywhere on Image
   a. Pixle Inspection Window pops up
5. Close Fluorecsnt Cells window
6. Open up again File->Open Samples->Fluorecsnt Cells
   a. Console window with Null Pointer Exception pops up

See screen recording:

NullPtr-PixelInspectionTool.mp4

PixelInspectionTool.java from GitHub:

https://github.com/imagej/ImageJ/blob/master/ij/plugin/tool/PixelInspectionTool.java

This might be the offending code if variable win is null at line 238.

	if (win == null) close();
	canvas = win.getCanvas();