Incorrect merge of languages configuration leads to errors on startup

[poliorcetics]

Summary

$ hx languages.toml
Bad language config: missing field `scope` for key `language`
Press <ENTER> to continue with default language config

Probably came up after #2145 ? I'm trying to test it Reverting fixes the problem

Reproduction Steps

My languages.toml:

[[language]]
name = "rust"

[language.config]
assist.importGranularity = "module"

then do:

$ cd $HOME/.config/helix/
$ hx language.toml
Bad language config: missing field `scope` for key `language`
Press <ENTER> to continue with default language config

Commenting out the whole languages.toml and repeating the steps does not raise the error.

Helix log

No response

Platform

macOS

Terminal Emulator

kitty 0.25.0

Helix Version

1525e3c

[archseer]

Reverted c8cfd0b for now

[poliorcetics]

I can confirm this fixes the problem

[the-mikedavis]

Let's close this out in favor of the original toml merging issue (#1000) since the revert.

[LeoniePhiline]

For the Googlers:

The error "Bad language config: missing field scope for key language" also occurs if you add an invalid/incomplete language to your languages.toml.

E.g. the following will trigger this message:

# Copy-pasted from "json" language, because prettier provides a "json5" parser - but the language config is incomplete.
# `scope` and other required fields are missing from the "json5" language configuration.
[[language]]
name = "json5"
formatter = { command = 'prettier', args = ["--parser", "json5"] }