51 lines
1.3 KiB
Rust
51 lines
1.3 KiB
Rust
#![allow(unused, incomplete_features)]
|
|
#![warn(clippy::large_stack_frames)]
|
|
#![feature(unsized_locals)]
|
|
|
|
use std::hint::black_box;
|
|
|
|
fn generic<T: Default>() {
|
|
let x = T::default();
|
|
black_box(&x);
|
|
}
|
|
|
|
fn unsized_local() {
|
|
let x: dyn std::fmt::Display = *(Box::new(1) as Box<dyn std::fmt::Display>);
|
|
black_box(&x);
|
|
}
|
|
|
|
struct ArrayDefault<const N: usize>([u8; N]);
|
|
|
|
impl<const N: usize> Default for ArrayDefault<N> {
|
|
fn default() -> Self {
|
|
Self([0; N])
|
|
}
|
|
}
|
|
|
|
fn many_small_arrays() {
|
|
//~^ ERROR: this function allocates a large amount of stack space
|
|
//~| NOTE: allocating large amounts of stack space can overflow the stack
|
|
let x = [0u8; 500_000];
|
|
let x2 = [0u8; 500_000];
|
|
let x3 = [0u8; 500_000];
|
|
let x4 = [0u8; 500_000];
|
|
let x5 = [0u8; 500_000];
|
|
black_box((&x, &x2, &x3, &x4, &x5));
|
|
}
|
|
|
|
fn large_return_value() -> ArrayDefault<1_000_000> {
|
|
//~^ ERROR: this function allocates a large amount of stack space
|
|
//~| NOTE: allocating large amounts of stack space can overflow the stack
|
|
Default::default()
|
|
}
|
|
|
|
fn large_fn_arg(x: ArrayDefault<1_000_000>) {
|
|
//~^ ERROR: this function allocates a large amount of stack space
|
|
//~| NOTE: allocating large amounts of stack space can overflow the stack
|
|
black_box(&x);
|
|
}
|
|
|
|
fn main() {
|
|
generic::<ArrayDefault<1_000_000>>();
|
|
}
|