rust/tests/ui/statics/unsizing-wfcheck-issue-127299.rs
Noah Lev 9479792cb4 WF-check struct field types at construction site
Rustc of course already WF-checked the field types at the definition
site, but for error tainting of consts to work properly, there needs to
be an error emitted at the use site. Previously, with no use-site error,
we proceeded with CTFE and ran into ICEs since we are running code with
type errors.

Emitting use-site errors also brings struct-like constructors more in
line with fn-like constructors since they already emit use-site errors
for WF issues.
2024-08-05 17:37:12 -07:00

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Rust

// This ensures we don't ICE in situations like rust-lang/rust#127299.
trait Qux {
fn bar() -> i32;
}
pub struct Lint {
pub desc: &'static dyn Qux,
//~^ ERROR cannot be made into an object
}
static FOO: &Lint = &Lint { desc: "desc" };
//~^ ERROR cannot be shared between threads safely
//~| ERROR cannot be made into an object
//~| ERROR cannot be made into an object
fn main() {}