warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:10:5 | LL | fn simple() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 0; | - `x` is part the function and will be dropped at the end of the function LL | &x | ^^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned = note: `#[warn(dangling_pointers_from_locals)]` on by default warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:17:5 | LL | fn bindings() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 0; | - `x` is part the function and will be dropped at the end of the function LL | let x = &x; | -- dangling pointer created here LL | x | ^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:24:12 | LL | fn bindings_with_return() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 42; | - `x` is part the function and will be dropped at the end of the function LL | let y = &x; | -- dangling pointer created here LL | return y; | ^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:30:5 | LL | fn with_simple_cast() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 0u8; | - `x` is part the function and will be dropped at the end of the function LL | &x as *const u8 | --^^^^^^^^^^^^^ | | | dangling pointer created here | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:37:5 | LL | fn bindings_and_casts() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 0u8; | - `x` is part the function and will be dropped at the end of the function LL | let x = &x as *const u8; | -- dangling pointer created here LL | x as *const u8 | ^^^^^^^^^^^^^^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:43:12 | LL | fn return_with_complex_cast() -> *mut u8 { | ------- return type of the function is `*mut u8` LL | let mut x = 0u8; | ----- `x` is part the function and will be 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: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:49:5 | LL | fn with_block() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 0; | - `x` is part the function and will be dropped at the end of the function LL | &{ x } | ^^^^^^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:57:13 | LL | fn with_many_blocks() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 0; | - `x` is part the function and will be dropped at the end of the function ... LL | / &{ LL | | LL | | { x } LL | | } | |_____________^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:67:12 | LL | fn simple_return() -> *const u8 { | --------- return type of the function is `*const u8` LL | let x = 0; | - `x` is part the function and will be dropped at the end of the function LL | return &x; | ^^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:73:12 | LL | fn return_mut() -> *mut u8 { | ------- return type of the function is `*mut u8` LL | let mut x = 0; | ----- `x` is part the function and will be dropped at the end of the function LL | return &mut x; | ^^^^^^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:80:16 | LL | fn const_and_flow() -> *const u8 { | --------- return type of the function is `*const u8` LL | if false { LL | let x = 8; | - `x` is part the function and will be dropped at the end of the function LL | return &x; | ^^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:88:5 | LL | fn vector() -> *const Vec { | ------------- return type of the function is `*const Vec` LL | let x = vec![T::default()]; | - `x` is part the function and will be dropped at the end of the function LL | &x | ^^ | = note: pointers do not have a lifetime; after returning, the `Vec` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:94:12 | LL | fn local_adt() -> *const Adt { | ---------- return type of the function is `*const Adt` LL | let x = Adt(5); | - `x` is part the function and will be dropped at the end of the function LL | return &x; | ^^ | = note: pointers do not have a lifetime; after returning, the `Adt` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:101:16 | LL | let _x = || -> *const u8 { | --------- return type of the closure is `*const u8` LL | let x = 8; | - `x` is part the closure and will be dropped at the end of the closure LL | return &x; | ^^ | = note: pointers do not have a lifetime; after returning, the `u8` will be deallocated at the end of the closure because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `x` will be dropped --> $DIR/dangling-pointers-from-locals.rs:113:5 | LL | fn fn_ptr() -> *const fn() -> u8 { | ----------------- return type of the function is `*const fn() -> u8` ... LL | let x = ret_u8 as fn() -> u8; | - `x` is part the function and will be dropped at the end of the function LL | &x | ^^ | = note: pointers do not have a lifetime; after returning, the `fn() -> u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `a` will be dropped --> $DIR/dangling-pointers-from-locals.rs:118:5 | LL | fn as_arg(a: Adt) -> *const Adt { | - ---------- return type of the function is `*const Adt` | | | `a` is part the function and will be dropped at the end of the function LL | &a | ^^ | = note: pointers do not have a lifetime; after returning, the `Adt` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `a` will be dropped --> $DIR/dangling-pointers-from-locals.rs:123:5 | LL | fn fn_ptr_as_arg(a: fn() -> u8) -> *const fn() -> u8 { | - ----------------- return type of the function is `*const fn() -> u8` | | | `a` is part the function and will be dropped at the end of the function LL | &a | ^^ | = note: pointers do not have a lifetime; after returning, the `fn() -> u8` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `a` will be dropped --> $DIR/dangling-pointers-from-locals.rs:128:5 | LL | fn ptr_as_arg(a: *const Adt) -> *const *const Adt { | - ----------------- return type of the function is `*const *const Adt` | | | `a` is part the function and will be dropped at the end of the function LL | &a | ^^ | = note: pointers do not have a lifetime; after returning, the `*const Adt` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: a dangling pointer will be produced because the local variable `a` will be dropped --> $DIR/dangling-pointers-from-locals.rs:133:5 | LL | fn adt_as_arg(a: &Adt) -> *const &Adt { | - ----------- return type of the function is `*const &Adt` | | | `a` is part the function and will be dropped at the end of the function LL | &a | ^^ | = note: pointers do not have a lifetime; after returning, the `&Adt` will be deallocated at the end of the function because nothing is referencing it as far as the type system is concerned warning: 19 warnings emitted