rust-clippy/tests/ui/slow_vector_initialization.stderr

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:13:5
   |
LL |     let mut vec1 = Vec::with_capacity(len);
   |                    ----------------------- help: consider replace allocation with: `vec![0; len]`
LL |     vec1.extend(repeat(0).take(len));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::slow-vector-initialization` implied by `-D warnings`

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:17:5
   |
LL |     let mut vec2 = Vec::with_capacity(len - 10);
   |                    ---------------------------- help: consider replace allocation with: `vec![0; len - 10]`
LL |     vec2.extend(repeat(0).take(len - 10));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:24:5
   |
LL |     let mut vec4 = Vec::with_capacity(len);
   |                    ----------------------- help: consider replace allocation with: `vec![0; len]`
LL |     vec4.extend(repeat(0).take(vec4.capacity()));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:34:5
   |
LL |     let mut resized_vec = Vec::with_capacity(30);
   |                           ---------------------- help: consider replace allocation with: `vec![0; 30]`
LL |     resized_vec.resize(30, 0);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:37:5
   |
LL |     let mut extend_vec = Vec::with_capacity(30);
   |                          ---------------------- help: consider replace allocation with: `vec![0; 30]`
LL |     extend_vec.extend(repeat(0).take(30));
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:44:5
   |
LL |     let mut vec1 = Vec::with_capacity(len);
   |                    ----------------------- help: consider replace allocation with: `vec![0; len]`
LL |     vec1.resize(len, 0);
   |     ^^^^^^^^^^^^^^^^^^^

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:52:5
   |
LL |     let mut vec3 = Vec::with_capacity(len - 10);
   |                    ---------------------------- help: consider replace allocation with: `vec![0; len - 10]`
LL |     vec3.resize(len - 10, 0);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:55:5
   |
LL |     let mut vec4 = Vec::with_capacity(len);
   |                    ----------------------- help: consider replace allocation with: `vec![0; len]`
LL |     vec4.resize(vec4.capacity(), 0);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: slow zero-filling initialization
  --> $DIR/slow_vector_initialization.rs:59:5
   |
LL |     vec1 = Vec::with_capacity(10);
   |            ---------------------- help: consider replace allocation with: `vec![0; 10]`
LL |     vec1.resize(10, 0);
   |     ^^^^^^^^^^^^^^^^^^

error: this argument is a mutable reference, but not used mutably
  --> $DIR/slow_vector_initialization.rs:62:18
   |
LL | fn do_stuff(vec: &mut [u8]) {}
   |                  ^^^^^^^^^ help: consider changing to: `&[u8]`
   |
   = note: `-D clippy::needless-pass-by-ref-mut` implied by `-D warnings`

error: aborting due to 10 previous errors