mirror of https://github.com/rust-lang/rust.git
46 lines
2.7 KiB
Plaintext
46 lines
2.7 KiB
Plaintext
warning: lint `temporary_cstring_as_ptr` has been renamed to `dangling_pointers_from_temporaries`
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--> $DIR/cstring-as-ptr.rs:2:9
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LL | #![deny(temporary_cstring_as_ptr)]
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| ^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `dangling_pointers_from_temporaries`
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= note: `#[warn(renamed_and_removed_lints)]` on by default
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error: a dangling pointer will be produced because the temporary `CString` will be dropped
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--> $DIR/cstring-as-ptr.rs:15:48
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LL | let s = CString::new("some text").unwrap().as_ptr();
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| ---------------------------------- ^^^^^^ this pointer will immediately be invalid
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| |
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| this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
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= note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
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= help: you must make sure that the variable you bind the `CString` to lives at least as long as the pointer returned by the call to `as_ptr`
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= help: in particular, if this pointer is returned from the current function, binding the `CString` inside the function will not suffice
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= help: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
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note: the lint level is defined here
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--> $DIR/cstring-as-ptr.rs:2:9
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LL | #![deny(temporary_cstring_as_ptr)]
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error: a dangling pointer will be produced because the temporary `CString` will be dropped
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--> $DIR/cstring-as-ptr.rs:9:52
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LL | let s = CString::new("some text").unwrap().as_ptr();
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| ---------------------------------- ^^^^^^ this pointer will immediately be invalid
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| |
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| this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
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...
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LL | mymacro!();
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| ---------- in this macro invocation
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= note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
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= help: you must make sure that the variable you bind the `CString` to lives at least as long as the pointer returned by the call to `as_ptr`
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= help: in particular, if this pointer is returned from the current function, binding the `CString` inside the function will not suffice
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= help: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
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= note: this error originates in the macro `mymacro` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 2 previous errors; 1 warning emitted
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