starting with layout causes 100% CPU usage

[cgahr]

How to reproduce

Starting zellij with the following layout causes 100% usage:

layout split_direction="vertical" {
    pane 
    pane split_direction="horizontal" {
        pane size="80%"
        pane size="20%"
    }
}

Log:

Command used:

$ zellij --debug --layout=test

Received empty message from server

This command crashes without pressing Ctrl + q.
Log:

WARN   |zellij_utils::input::layo| 2023-10-25 22:38:04.626 [main      ] [zellij-utils/src/input/layout.rs:962]: Failed to read swap layout file: /home/cgahr_mpi/.config/zellij/layouts/test.swap.kdl. Error: Os { code: 2, kind: NotFound, message: "No such file or directory" } 
INFO   |zellij_client            | 2023-10-25 22:38:04.634 [main      ] [zellij-client/src/lib.rs:152]: Starting Zellij client! 
INFO   |zellij_server            | 2023-10-25 22:38:04.642 [main      ] [zellij-server/src/lib.rs:245]: Starting Zellij server! 
INFO   |zellij_server            | 2023-10-25 22:38:04.700 [main      ] [zellij-server/src/lib.rs:913]: Compiling plugins using Cranelift 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:806]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:907]: Server ready, retrying sending instruction. 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:806]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:815]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:907]: Server ready, retrying sending instruction. 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:815]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:826]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:907]: Server ready, retrying sending instruction. 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:826]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:837]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:907]: Server ready, retrying sending instruction. 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:837]: Server not ready, trying to place instruction in retry queue... 
WARN   |zellij_server::route     | 2023-10-25 22:38:04.701 [server_router] [zellij-server/src/route.rs:837]: Server not ready, trying to place instruction in retry queue... 
INFO   |zellij_server::plugins   | 2023-10-25 22:38:04.702 [wasm      ] [zellij-server/src/plugins/mod.rs:137]: Wasm main thread starts 
ERROR  |???                      | 2023-10-25 22:38:04.713 [screen    ] [zellij-server/src/panes/tiled_panes/mod.rs:822]: a non-fatal error occured

Caused by:
    0: failed to resize tab vertically
    1: Ran out of room for spans 
WARN   |zellij_utils::ipc        | 2023-10-25 22:38:11.949 [router    ] [zellij-utils/src/ipc.rs:222]: Error in IpcReceiver.recv(): InvalidMarkerRead(Error { kind: UnexpectedEof, message: "failed to fill whole buffer" }) 
ERROR  |zellij_client            | 2023-10-25 22:38:11.951 [router    ] [zellij-client/src/lib.rs:348]: Received empty message from server 

Basic information

zellij --version: zellij 0.38.2
stty size: 52 106
uname -av: Linux cgahr-ThinkPad-T14-Gen-1 6.2.0-35-generic #35~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Oct 6 10:23:26 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
alacritty --version: alacritty 0.12.3

[imsnif]

I agree we should error on this instead of crashing, but I think what you want is:

layout {
    pane split_direction="vertical" {
        pane 
        pane split_direction="horizontal" {
            pane size="80%"
            pane size="20%"
        }
    }
}

[cgahr]

Yeah, I quickly realized that my config is wrong.

But erroring out would probably be better.