mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 15:23:46 +00:00
34 lines
1.8 KiB
Plaintext
34 lines
1.8 KiB
Plaintext
error: getting the inner pointer of a temporary `CString`
|
|
--> $DIR/lint-temporary-cstring-as-ptr.rs:14:48
|
|
|
|
|
LL | let s = CString::new("some text").unwrap().as_ptr();
|
|
| ---------------------------------- ^^^^^^ this pointer will be invalid
|
|
| |
|
|
| this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
|
|
|
|
|
= 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
|
|
= help: for more information, see https://doc.rust-lang.org/reference/destructors.html
|
|
note: the lint level is defined here
|
|
--> $DIR/lint-temporary-cstring-as-ptr.rs:2:9
|
|
|
|
|
LL | #![deny(temporary_cstring_as_ptr)]
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
error: getting the inner pointer of a temporary `CString`
|
|
--> $DIR/lint-temporary-cstring-as-ptr.rs:8:52
|
|
|
|
|
LL | let s = CString::new("some text").unwrap().as_ptr();
|
|
| ---------------------------------- ^^^^^^ this pointer will be invalid
|
|
| |
|
|
| this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
|
|
...
|
|
LL | mymacro!();
|
|
| ---------- in this macro invocation
|
|
|
|
|
= 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
|
|
= help: for more information, see https://doc.rust-lang.org/reference/destructors.html
|
|
= note: this error originates in the macro `mymacro` (in Nightly builds, run with -Z macro-backtrace for more info)
|
|
|
|
error: aborting due to 2 previous errors
|
|
|