Selection (marching ants) becomes permanently invisible
Submitted by Timofei Shatrov
Link to original bug (#678055)
Description
Sometimes marching ants just stop showing up completely, regardless of "show selection" setting. It is impossible to turn them back on, however usually if I open another window they work as intended in that window.
It is an old problem as seen here: http://www.gimpchat.com/viewtopic.php?f=8&t=4311
Today I have finally managed to reliably reproduce it.
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Create a new image.
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Make rectangular selection.
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Using a tablet, choose a paintbrush tool, click inside the image window, drag outside of it and then in again. Notice that in Device Status the device momentarily switches to Core Pointer. This actually makes a lot of things break (i.e. it switches out of current path with a Path tool, and text tool is also unusable with a tablet for this very reason). I've been told that the tablet support is supposed to be broken in GIMP 2.8 (it works perfectly with my Wacom aside from this). However what happens next is really interesting.
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At this point the selection might still be visible. But press Delete and it instantly disappears. Everything is still functional, but the selection is in permanent "show selection: off" mode. I'm pretty sure there's no way to bring it back aside from loading the image in a new window.
Again, this is perhaps just one of possible ways to permanently "disappear" a selection. I discovered it when trying to understand the abovementioned tablet glitch. Clearly it's possible to bring GIMP in a state where it never shows marching ants again, which seems like a bug to me.
Version: 2.8.0