Array merging (eg rustflags) appears to be in reverse order

[nipunn1313]

According to https://doc.rust-lang.org/nightly/cargo/reference/config.html#hierarchical-structure -

If a key is specified in multiple config files, the values will get merged together. Numbers, strings, and booleans will use the value in the deeper config directory taking precedence over ancestor directories, where the home directory is the lowest priority. Arrays will be joined together with higher precedence items being placed later in the merged array.

I am finding that if I place some rustflags in ~/.cargo/config.toml and some in $myrepo/.cargo/config.toml, then cargo and cargo-config2 merge in reverse order - with I believe cargo implementing the spec behavior, and cargo-config2 doing it in reverse.

I have a repro here
https://github.com/nipunn1313/cargo_config_array_merge_repro

[taiki-e]

Fixed in 0.1.24. Thanks for the report!

[nipunn1313]

confirmed that the fix works on my repro!