From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:03 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/consts/const-trait-to-trait.rs | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 tests/ui/consts/const-trait-to-trait.rs (limited to 'tests/ui/consts/const-trait-to-trait.rs') diff --git a/tests/ui/consts/const-trait-to-trait.rs b/tests/ui/consts/const-trait-to-trait.rs new file mode 100644 index 000000000..12a2999d7 --- /dev/null +++ b/tests/ui/consts/const-trait-to-trait.rs @@ -0,0 +1,24 @@ +// run-pass +#![allow(dead_code)] +#![allow(unused_variables)] +// Issue #24644 - block causes a &Trait -> &Trait coercion: +trait Trait {} + +struct Bar; +impl Trait for Bar {} + +fn main() { + let x: &[&dyn Trait] = &[{ &Bar }]; +} + +// Issue #25748 - the cast causes an &Encoding -> &Encoding coercion: +pub struct UTF8Encoding; +pub const UTF_8: &'static UTF8Encoding = &UTF8Encoding; +pub trait Encoding {} +impl Encoding for UTF8Encoding {} +pub fn f() -> &'static dyn Encoding { UTF_8 as &'static dyn Encoding } + +// Root of the problem: &Trait -> &Trait coercions: +const FOO: &'static dyn Trait = &Bar; +const BAR: &'static dyn Trait = FOO; +fn foo() { let _x = BAR; } -- cgit v1.2.3