tests/ui/lint/dangling-pointers-from-locals.stderr

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:10:5
   |
LL | fn simple() -> *const u8 {
   |                --------- return type is `*const u8`
LL |     let x = 0;
   |         - local variable `x` is dropped at the end of the function
LL |     &x
   |     ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior
   = note: `#[warn(dangling_pointers_from_locals)]` on by default

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:17:5
   |
LL | fn bindings() -> *const u8 {
   |                  --------- return type is `*const u8`
LL |     let x = 0;
   |         - local variable `x` is dropped at the end of the function
LL |     let x = &x;
   |             -- dangling pointer created here
LL |     x
   |     ^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:24:12
   |
LL | fn bindings_with_return() -> *const u8 {
   |                              --------- return type is `*const u8`
LL |     let x = 42;
   |         - local variable `x` is dropped at the end of the function
LL |     let y = &x;
   |             -- dangling pointer created here
LL |     return y;
   |            ^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:30:5
   |
LL | fn with_simple_cast() -> *const u8 {
   |                          --------- return type is `*const u8`
LL |     let x = 0u8;
   |         - local variable `x` is dropped at the end of the function
LL |     &x as *const u8
   |     --^^^^^^^^^^^^^
   |     |
   |     dangling pointer created here
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:37:5
   |
LL | fn bindings_and_casts() -> *const u8 {
   |                            --------- return type is `*const u8`
LL |     let x = 0u8;
   |         - local variable `x` is dropped at the end of the function
LL |     let x = &x as *const u8;
   |             -- dangling pointer created here
LL |     x as *const u8
   |     ^^^^^^^^^^^^^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:43:12
   |
LL | fn return_with_complex_cast() -> *mut u8 {
   |                                  ------- return type is `*mut u8`
LL |     let mut x = 0u8;
   |         ----- local variable `x` is dropped at the end of the function
LL |     return &mut x as *mut u8 as *const u8 as *mut u8;
   |            ------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |            |
   |            dangling pointer created here
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:49:5
   |
LL | fn with_block() -> *const u8 {
   |                    --------- return type is `*const u8`
LL |     let x = 0;
   |         - local variable `x` is dropped at the end of the function
LL |     &{ x }
   |     ^^^^^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:57:13
   |
LL |   fn with_many_blocks() -> *const u8 {
   |                            --------- return type is `*const u8`
LL |       let x = 0;
   |           - local variable `x` is dropped at the end of the function
...
LL | /             &{
LL | |
LL | |                 { x }
LL | |             }
   | |_____________^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:67:12
   |
LL | fn simple_return() -> *const u8 {
   |                       --------- return type is `*const u8`
LL |     let x = 0;
   |         - local variable `x` is dropped at the end of the function
LL |     return &x;
   |            ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:73:12
   |
LL | fn return_mut() -> *mut u8 {
   |                    ------- return type is `*mut u8`
LL |     let mut x = 0;
   |         ----- local variable `x` is dropped at the end of the function
LL |     return &mut x;
   |            ^^^^^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:80:16
   |
LL | fn const_and_flow() -> *const u8 {
   |                        --------- return type is `*const u8`
LL |     if false {
LL |         let x = 8;
   |             - local variable `x` is dropped at the end of the function
LL |         return &x;
   |                ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:88:5
   |
LL | fn vector<T: Default>() -> *const Vec<T> {
   |                            ------------- return type is `*const Vec<T>`
LL |     let x = vec![T::default()];
   |         - local variable `x` is dropped at the end of the function
LL |     &x
   |     ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:94:12
   |
LL | fn local_adt() -> *const Adt {
   |                   ---------- return type is `*const Adt`
LL |     let x = Adt(5);
   |         - local variable `x` is dropped at the end of the function
LL |     return &x;
   |            ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: closure returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:101:16
   |
LL |     let _x = || -> *const u8 {
   |                    --------- return type is `*const u8`
LL |         let x = 8;
   |             - local variable `x` is dropped at the end of the closure
LL |         return &x;
   |                ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `x`
  --> $DIR/dangling-pointers-from-locals.rs:113:5
   |
LL | fn fn_ptr() -> *const fn() -> u8 {
   |                ----------------- return type is `*const fn() -> u8`
...
LL |     let x = ret_u8 as fn() -> u8;
   |         - local variable `x` is dropped at the end of the function
LL |     &x
   |     ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `a`
  --> $DIR/dangling-pointers-from-locals.rs:118:5
   |
LL | fn as_arg(a: Adt) -> *const Adt {
   |           -          ---------- return type is `*const Adt`
   |           |
   |           local variable `a` is dropped at the end of the function
LL |     &a
   |     ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `a`
  --> $DIR/dangling-pointers-from-locals.rs:123:5
   |
LL | fn fn_ptr_as_arg(a: fn() -> u8) -> *const fn() -> u8 {
   |                  -                 ----------------- return type is `*const fn() -> u8`
   |                  |
   |                  local variable `a` is dropped at the end of the function
LL |     &a
   |     ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `a`
  --> $DIR/dangling-pointers-from-locals.rs:128:5
   |
LL | fn ptr_as_arg(a: *const Adt) -> *const *const Adt {
   |               -                 ----------------- return type is `*const *const Adt`
   |               |
   |               local variable `a` is dropped at the end of the function
LL |     &a
   |     ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: function returns a dangling pointer to dropped local variable `a`
  --> $DIR/dangling-pointers-from-locals.rs:133:5
   |
LL | fn adt_as_arg(a: &Adt) -> *const &Adt {
   |               -           ----------- return type is `*const &Adt`
   |               |
   |               local variable `a` is dropped at the end of the function
LL |     &a
   |     ^^
   |
   = note: a dangling pointer is safe, but dereferencing one is undefined behavior

warning: 19 warnings emitted