mux: split, close, split again -> wonky sizing

[wez]

The position problem still exists. (Split a pane, close a pane, split again, this time pane goes to the place of a third pane, as if the second pane was split.)

Originally posted by @CIAvash in https://github.com/wez/wezterm/issues/1752#issuecomment-1088858264

[mtanda]

When I'm using top-level split, I hit similar issue. The upper left pane is original pane. I expect bottom pane height is same as upper pane height.

How to reproduce.

wezterm cli split-pane --right
wezterm cli split-pane --top-level --bottom
# close bottom pane
wezterm cli split-pane --top-level --bottom

The wezterm version is 20220905-102802,7d4b8249. I hit this issue on macOS and Windows.

[aca]

Any updates on this?

[wez]

I can't reproduce either of these scenarios on the very latest nightly build. Note that I did hit an unrelated deadlock when using wezterm cli split-pane to test this; that is resolved by 829e5c15cfe34c00ebd36b55dc929ac3b0cc83f1 but didn't trigger if you use key assignments to split.

[github-actions[bot]]

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