Problem statement

Describe: 1) what you have tried, 2) what you expected, and 3) what actually happened.

I'm working on an automated export pipeline for the artists on the team, and I've hit one folder of slices that gives a weird error when I attempt to pack it. I first encountered it from the command line, but it gives essentially the same error when exported through the GUI as well.

Give step-by-step instructions so we can reproduce the problem, if possible.

Pack a folder of slices with a command like this:

Spine.com -Xmx65536m -i "C:/Users/Hazel/KO_OP/plastic/GVH Raw Animation/Artwork/Building Blocks/Fang/Fang_MS_Basic_edited 2_autoslice" -o "C:/Users/Hazel/KO_OP/plastic/GVH Raw Animation/Export/Atlases" -n "Fang_MS_Basic_edited 2" -p "C:/Users/Hazel/KO_OP/plastic/GVH Raw Animation/Export/settings/4_0/pack.json"

It will give the error shown in the log below.
Other folders are still working fine, though it's worth noting that this is easily our largest one.

Editor information

Tell us your Spine Editor version.
4.1.19

Post your entire spine.log file here (or attach it), if you got any error messages.

Spine Launcher 4.0.41
Esoteric Software LLC (C) 2013-2021 | http://esotericsoftware.com
Windows 10 Pro amd64 10.0
Starting: Spine 4.1.19 Professional
Spine 4.1.19 Professional
Licensed to: *******
Pack: Fang_MS_Basic_edited 2
ERROR: Error packing images:
[error] Error packing images: C:\Users\Hazel\KO_OP\plastic\GVH Raw Animation\Artwork\Building Blocks\Fang\Fang_MS_Basic_edited 2_autoslice
   at s.WOL._(_:165)
   at s.eLi._(_:78)
   at s.eLi._(_:126)
   at s.EnT._(_:297)
   at s.ePE._(_:39)
   <events>
Cause: [error] Error processing directory: C:\Users\Hazel\KO_OP\plastic\GVH Raw Animation\Artwork\Building Blocks\Fang\Fang_MS_Basic_edited 2_autoslice
   at s.gLQ._(_:136)
   at s.Npb._(_:133)
   at s.gLQ._(_:99)
   at s.Npb._(_:115)
   at s.WOL._(_:159) ...
Cause: [NegativeArraySize] -2147483648
   at java.awt.image.DataBufferByte.<init>(Unknown Source)
   at java.awt.image.Raster.createInterleavedRaster(Unknown Source)
   at java.awt.image.BufferedImage.<init>(Unknown Source)
   at s.itZ._(_:248)
   at s.itZ._(_:181)
   at s.qFg._(_:134)
   at s.Npb._(_:284)
   at s.Npb._(_:276)
   at s.gLQ._(_:134) ...