error: using `libc::strlen` on a `CString` or `CStr` value --> $DIR/strlen_on_c_strings.rs:11:24 | LL | let len = unsafe { libc::strlen(cstring.as_ptr()) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::strlen-on-c-strings` implied by `-D warnings` help: try this (you might also need to get rid of `unsafe` block in some cases): | LL | let len = unsafe { cstring.as_bytes().len() }; | ^^^^^^^^^^^^^^^^^^^^^^^^ error: using `libc::strlen` on a `CString` or `CStr` value --> $DIR/strlen_on_c_strings.rs:15:24 | LL | let len = unsafe { libc::strlen(cstr.as_ptr()) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: try this (you might also need to get rid of `unsafe` block in some cases): | LL | let len = unsafe { cstr.to_bytes().len() }; | ^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors