Add #[must_use] to alloc functions that would leak memory#90427
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Add #[must_use] to alloc functions that would leak memory#90427bors merged 1 commit intorust-lang:masterfrom
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…askrgr Rollup of 8 pull requests Successful merges: - rust-lang#89446 (Add paragraph to ControlFlow docs to menion it works with the ? operator (rust-lang#88715)) - rust-lang#89677 (Stabilize `is_symlink()` for `Metadata` and `Path`) - rust-lang#89833 (Add #[must_use] to Rc::downgrade) - rust-lang#89835 (Add #[must_use] to expensive computations) - rust-lang#89839 (Add #[must_use] to mem/ptr functions) - rust-lang#89897 (Add #[must_use] to remaining core functions) - rust-lang#89951 (Stabilize `option_result_unwrap_unchecked`) - rust-lang#90427 (Add #[must_use] to alloc functions that would leak memory) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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| /// let x_ptr = Arc::into_raw(x); | ||
| /// assert_eq!(unsafe { &*x_ptr }, "hello"); | ||
| /// ``` | ||
| #[must_use = "losing the pointer will leak memory"] |
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This one feels like it could lead to false positives. This is Arc, so you can get the data back via another instance.
not sure if it happens in practice though. I think I used that once to simulate
increment_strong_count? Not sure.
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As requested by @joshtriplett.
I added
reallocmyself. Clippy ignored it because of itsmutargument.Parent issue: #89692
r? @joshtriplett