#[stable(feature = "rust1", since = "1.0.0")]
#[lang = "sized"]
#[rustc_on_unimplemented(
+ on(parent_trait="std::path::Path", label="borrow the `Path` instead"),
message="the size for values of type `{Self}` cannot be known at compilation time",
label="doesn't have a size known at compile-time",
note="to learn more, visit <https://doc.rust-lang.org/book/second-edition/\
flags.push(("from_method".to_owned(), Some(method.to_string())));
}
}
+ if let Some(t) = self.get_parent_trait_ref(&obligation.cause.code) {
+ flags.push(("parent_trait".to_owned(), Some(t.to_string())));
+ }
if let Some(k) = obligation.cause.span.compiler_desugaring_kind() {
flags.push(("from_desugaring".to_owned(), None));
--> $DIR/E0277.rs:23:6
|
LL | fn f(p: Path) { }
- | ^ doesn't have a size known at compile-time
+ | ^ borrow the `Path` instead
|
= help: within `std::path::Path`, the trait `std::marker::Sized` is not implemented for `[u8]`
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
--- /dev/null
+use std::path::Path;
+
+fn f(p: Path) { }
+//~^ ERROR E0277
+
+fn main() {}
--- /dev/null
+error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
+ --> $DIR/path-by-value.rs:3:6
+ |
+LL | fn f(p: Path) { }
+ | ^ borrow the `Path` instead
+ |
+ = help: within `std::path::Path`, the trait `std::marker::Sized` is not implemented for `[u8]`
+ = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
+ = note: required because it appears within the type `std::path::Path`
+ = note: all local variables must have a statically known size
+ = help: unsized locals are gated as an unstable feature
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.