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Rust std `set_extension` is either add an extension if none exists, or edit the current one if such exists. This caused a mishandling when user is using a name with a dot, part of the name was treated as an extension, and be overwritten by the different format extensions. So manually *adding* a new dummy extension will cause the current code, to behave as expected, since it will always overwrite the new dummy extension and not part of the name.
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@matthiasbeyer hi, |
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Thanks! I really like the commit message, thanks for improving it! ❤️ 🎉 |
This was referenced Aug 15, 2025
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The helper method is redundant (_introduced as a [bug fix in Mar 2022](#306), there is a much simpler approach to append the extension. - [`as_mut_os_string()`](https://doc.rust-lang.org/std/path/struct.Path.html#method.as_mut_os_str) has been available since Rust `1.70.0`, matching the MSRV of this crate since the introduction of [`OnceLock`](https://doc.rust-lang.org/std/sync/struct.OnceLock.html) [in Oct 2024](#515) (_`0.14.1` release_). - Additionally revised the comment and included a conditional statement to better communicate the intent for why this placeholder is necessary.
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Rust std
set_extensionis either add an extension if none exists, oredit the current one if such exists.
This caused a mishandling when user is using a name with a dot,
part of the name was treated as an extension, and be overwritten by
the different format extensions.
So manually adding a new dummy extension will cause the current code,
to behave as expected, since it will always overwrite the new dummy
extension and not part of the name.