mirror of
https://github.com/rust-lang/rust-clippy
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52 lines
2.6 KiB
Text
52 lines
2.6 KiB
Text
error: transmuting a known null pointer into a function pointer
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--> tests/ui/transmute_null_to_fn.rs:8:23
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LL | let _: fn() = std::mem::transmute(0 as *const ());
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this transmute results in undefined behavior
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= help: try wrapping your function pointer type in `Option<T>` instead, and using `None` as a null pointer value
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= note: `-D clippy::transmute-null-to-fn` implied by `-D warnings`
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= help: to override `-D warnings` add `#[allow(clippy::transmute_null_to_fn)]`
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error: transmuting a known null pointer into a function pointer
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--> tests/ui/transmute_null_to_fn.rs:10:23
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LL | let _: fn() = std::mem::transmute(std::ptr::null::<()>());
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this transmute results in undefined behavior
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= help: try wrapping your function pointer type in `Option<T>` instead, and using `None` as a null pointer value
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error: transmuting a known null pointer into a function pointer
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--> tests/ui/transmute_null_to_fn.rs:21:23
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LL | let _: fn() = std::mem::transmute(ZPTR);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^ this transmute results in undefined behavior
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= help: try wrapping your function pointer type in `Option<T>` instead, and using `None` as a null pointer value
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error: transmuting a known null pointer into a function pointer
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--> tests/ui/transmute_null_to_fn.rs:30:23
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LL | let _: fn() = std::mem::transmute(0 as *const u8 as *const ());
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this transmute results in undefined behavior
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= help: try wrapping your function pointer type in `Option<T>` instead, and using `None` as a null pointer value
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error: transmuting a known null pointer into a function pointer
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--> tests/ui/transmute_null_to_fn.rs:32:23
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LL | let _: fn() = std::mem::transmute(std::ptr::null::<()>() as *const u8);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this transmute results in undefined behavior
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= help: try wrapping your function pointer type in `Option<T>` instead, and using `None` as a null pointer value
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error: transmuting a known null pointer into a function pointer
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--> tests/ui/transmute_null_to_fn.rs:34:23
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LL | let _: fn() = std::mem::transmute(ZPTR as *const u8);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this transmute results in undefined behavior
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= help: try wrapping your function pointer type in `Option<T>` instead, and using `None` as a null pointer value
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error: aborting due to 6 previous errors
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