rubyfmt 0.10.0 failed to build against rust 1.79.0

[chenrui333]

seeing some build errors while upgrading rust to 1.79.0

error build log

  ==> cargo install
  Last 150 lines from /Users/brew/actions-runner/_work/homebrew-core/homebrew-core/bottles/logs/rubyfmt/01.cargo:
      --> librubyfmt/src/ripper_tree_types.rs:1413:16
       |
  1413 |     NotPresent(bool),
       |     ---------- ^^^^
       |     |
       |     field in this variant
       |
  help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
       |
  1413 |     NotPresent(()),
       |                ~~
  
  error: field `3` is never read
      --> librubyfmt/src/ripper_tree_types.rs:1424:5
       |
  1420 | pub struct ArgsAddBlock(
       |            ------------ field in this struct
  ...
  1424 |     pub StartEnd,
       |     ^^^^^^^^^^^^
       |
       = note: `ArgsAddBlock` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
  help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
       |
  1424 |     (),
       |     ~~
  
  error: field `0` is never read
      --> librubyfmt/src/ripper_tree_types.rs:1430:16
       |
  1430 |     EmptyParen((paren_tag, bool)),
       |     ---------- ^^^^^^^^^^^^^^^^^
       |     |
       |     field in this variant
       |
  help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
       |
  1430 |     EmptyParen(()),
       |                ~~
  
  error: field `1` is never read
      --> librubyfmt/src/ripper_tree_types.rs:1933:35
       |
  1933 | pub struct Period(pub period_tag, pub String, pub LineCol);
       |            ------                 ^^^^^^^^^^
       |            |
       |            field in this struct
       |
       = note: `Period` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
  help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
       |
  1933 | pub struct Period(pub period_tag, (), pub LineCol);
       |                                   ~~
  
  
       |
  2114 |     Period(()),
       |            ~~
  
  error: field `0` is never read
      --> librubyfmt/src/ripper_tree_types.rs:2115:8
       |
  2115 |     Op(Operator),
       |     -- ^^^^^^^^
       |     |
       |     field in this variant
       |
  help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
       |
  2115 |     Op(()),
       |        ~~
  
  error: field `0` is never read
      --> librubyfmt/src/ripper_tree_types.rs:2280:35
       |
  2280 |     EmptyBecauseParamsWerePresent(bool),
       |     ----------------------------- ^^^^
       |     |
       |     field in this variant
       |
  help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
       |
  2280 |     EmptyBecauseParamsWerePresent(()),
       |                                   ~~
  
  error: field `0` is never read
      --> librubyfmt/src/ripper_tree_types.rs:2281:36
       |
  2281 |     NilBecauseParamsWereNotPresent(Option<()>),
       |     ------------------------------ ^^^^^^^^^^
       |     |
       |     field in this variant
       |
  help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
       |
  2281 |     NilBecauseParamsWereNotPresent(()),
       |                                    ~~
  
  error: could not compile `rubyfmt` (lib) due to 17 previous errors