Crash: StrongDMM crashes when resizing the map

[EuSouAFazer]

Version

v2.8.1.alpha

What happened?

When trying to resize the map StrongDMM crashed

Reproduction

1. Run StrongDMM
2. I opened with tgstation's codebase and opened the following map: https://www.dropbox.com/s/eshbcbhiyz49it6/SSB13%20-%20Junglemap.dmm?dl=0
3. Then, I tried changing its size - from 90-90-2 to 120-120-2
4. Clicking the "Set" button crashes StrongDMM

Relevant log output

2023-08-06 16:11:47 DBG sdmm/internal/app/render/bucket/level/chunk/chunk.go:62 > chunk level [2] updated: X1:76, Y1:76, X2:100, Y2:100
2023-08-06 16:11:47 DBG sdmm/internal/app/render/bucket/level/chunk/chunk.go:62 > chunk level [2] updated: X1:101, Y1:76, X2:120, Y2:100
2023-08-06 16:11:47 DBG sdmm/internal/app/render/bucket/level/chunk/chunk.go:62 > chunk level [2] updated: X1:101, Y1:101, X2:120, Y2:120
2023-08-06 16:11:47 DBG sdmm/internal/app/render/bucket/level/chunk/chunk.go:62 > chunk level [2] updated: X1:1, Y1:1, X2:25, Y2:25
2023-08-06 16:11:47 DBG sdmm/internal/app/render/bucket/bucket.go:30 > bucket updated
2023-08-06 16:11:47 DBG sdmm/internal/app/command/storage.go:189 > stack action [push command: Set Map Size] on [C:\Users\USUARIO\Desktop\strongdmm-windows\SSB13 - Junglemap.dmm]


These are the last lines on the log where the crash happened.