**Added 2024-03-17**: I tested the same steps for the same pattern in

Golly 4.3b1, and this seems to be fixed now. (Others are welcome to test as well)

I got the following steps, when trying to reproduce this:

* Turn "View -> Show Exact Numbers" on.

* Open the pattern via "Open Clipboard". The top-left cell should get coordinates (0,0).

* Use goto.lua to go to the generation 1000000000000000 (10^15).

* The displayed population is 1,042,324,103,587,982.

* Add a single state-1 cell at X = 56, Y = 43 (inside the tub).

* Now the displayed population is 1,042,324,158,506,313. (Addition of one cell changed the population by more than 1.)

* Press F to zoom out. Instead of the expected single diagonal line, there are two intersecting diagonal lines.

b3s23love wrote: ↑October 1st, 2023, 4:21 pm

(is it a bug or it has to do with HashLife?)

Steps to reproduce this bug (along with a description):

1. Run this pattern up to the moment when the loaves appear.

Code: Select all

```
x = 112, y = 89, rule = LifeSuper
3S18.8Q20.12Q4.5Q2.Q15.2M15.Q$2.S19.Q4.Q22.Q3.2Q8.2Q.Q.4Q.Q13.2M8.2Q
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10.2S8.pA8.S5.S7.3M18.3Q.2Q$29.pA10.pA5.2S5.S5.pA10.S.S3.S.S5.M7.2M
13.3Q.Q$35.2pA6.S3.S2.3S5.pA.pA10.S5.S6.2M6.2M12.Q3.2Q$7.O15.2W10.2pA
6.4S3.S8.pA.pA6.S5.S33.Q.Q$6.O.O14.2W31.O3.pA.pA4.S.S3.S.S12.Q17.Q2.Q
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.2U5.2M3.M3.2M23.M.2M.M$26.2M4.O.O11.S4.4U3.U6.M2.M4.M17.M7.M3.2M$28.
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2M3.M2.2M2.M5.M2.M3.5Q2.2M!
```

2. Add one cell to the interior of the diehard.

3. Observe that the population changed by more than 1 cell.

4. Zoom out the pattern.

5. Zoom in to the big diagonal line that was just created by the 1-cell difference.

6. Observe that the patterns that are positioned in the diagonal are just pieces of the engineered diehard (hashtile?).

Very strange and annoying. I don't think it's fixable, though. Would someone like to explain why this does exist?