the rust compiler is just lovely

❯ cargo test --bin day01
   Compiling advent-2023 v0.1.0 (/Users/rob/src/adventofcode/2023)
error[E0608]: cannot index into a value of type `(&str, Vec<{integer}>)`
  --> src/bin/day01.rs:76:42
   |
76 |             assert_eq!(convert(parse(pair[0])), pair[1]);
   |                                          ^^^ help: to access tuple elements, use: `.0`

error[E0608]: cannot index into a value of type `(&str, Vec<{integer}>)`
  --> src/bin/day01.rs:76:53
   |
76 |             assert_eq!(convert(parse(pair[0])), pair[1]);
   |                                                     ^^^ help: to access tuple elements, use: `.1`

For more information about this error, try `rustc --explain E0608`.
error: could not compile `advent-2023` (bin "day01" test) due to 2 previous errors

There really is just something special about how much effort people have put in to making rustc not only give good errors, but in a lot of cases just figure out what you wanted to do and tell you how, instead of just an inscrutable PARSE ERROR: git gud.