error: you are getting the inner pointer of a temporary `CString`
  --> $DIR/cstring.rs:7:5
   |
LL |     CString::new("foo").unwrap().as_ptr();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: #[deny(clippy::temporary_cstring_as_ptr)] on by default
   = note: that pointer will be invalid outside this expression
help: assign the `CString` to a variable to extend its lifetime
  --> $DIR/cstring.rs:7:5
   |
LL |     CString::new("foo").unwrap().as_ptr();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error