Many unhandled results:
```
warning: unused `std::result::Result` that must be used
--> hg-core/src/dirstate/dirs_multiset.rs:42:21
|
42 | multiset.add_path(filename);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_must_use)] on by default
= note: this `Result` may be an `Err` variant, which should be handled
warning: unused `std::result::Result` that must be used
--> hg-core/src/dirstate/dirs_multiset.rs:45:17
|
45 | multiset.add_path(filename);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: this `Result` may be an `Err` variant, which should be handled
warning: unused `std::result::Result` that must be used
--> hg-core/src/dirstate/dirs_multiset.rs:59:13
|
59 | multiset.add_path(filename);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: this `Result` may be an `Err` variant, which should be handled
warning: unused `std::result::Result` that must be used
--> hg-core/src/dirstate/dirstate_map.rs:129:17
|
129 | all_dirs.add_path(filename);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: this `Result` may be an `Err` variant, which should be handled
```
Might be better to do `path.check_state()` in cpython layer, and insert
`debug_assert` to hg-core.
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