error: indexing into a string may panic if the index is within a UTF-8 character
  --> $DIR/string_slice.rs:5:6
   |
LL |     &"Ölkanne"[1..];
   |      ^^^^^^^^^^^^^^
   |
   = note: `-D clippy::string-slice` implied by `-D warnings`

error: indexing into a string may panic if the index is within a UTF-8 character
  --> $DIR/string_slice.rs:7:6
   |
LL |     &m[2..5];
   |      ^^^^^^^

error: indexing into a string may panic if the index is within a UTF-8 character
  --> $DIR/string_slice.rs:9:6
   |
LL |     &s[0..2];
   |      ^^^^^^^

error: aborting due to 3 previous errors