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