diff options
| -rw-r--r-- | compiler/rustc_typeck/src/astconv/mod.rs | 1 | ||||
| -rw-r--r-- | src/test/ui/issues/issue-87199.rs | 3 | ||||
| -rw-r--r-- | src/test/ui/issues/issue-87199.stderr | 36 |
3 files changed, 16 insertions, 24 deletions
diff --git a/compiler/rustc_typeck/src/astconv/mod.rs b/compiler/rustc_typeck/src/astconv/mod.rs index 2e42d65cce2..f55e274ef8e 100644 --- a/compiler/rustc_typeck/src/astconv/mod.rs +++ b/compiler/rustc_typeck/src/astconv/mod.rs @@ -838,6 +838,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o { this does nothing because the given bound is not \ a default; only `?Sized` is supported", ); + return false; } } } diff --git a/src/test/ui/issues/issue-87199.rs b/src/test/ui/issues/issue-87199.rs index f2c57e44077..a80a64a2f87 100644 --- a/src/test/ui/issues/issue-87199.rs +++ b/src/test/ui/issues/issue-87199.rs @@ -7,15 +7,14 @@ // Check that these function definitions only emit warnings, not errors fn arg<T: ?Send>(_: T) {} //~^ warning: default bound relaxed for a type parameter, but this does nothing -//~^^ the size for values of type `T` fn ref_arg<T: ?Send>(_: &T) {} //~^ warning: default bound relaxed for a type parameter, but this does nothing fn ret() -> impl Iterator<Item = ()> + ?Send { std::iter::empty() } //~^ warning: default bound relaxed for a type parameter, but this does nothing -//~^^ the size for values of type `impl Iterator+?Sized` cannot be known // Check that there's no `?Sized` relaxation! fn main() { ref_arg::<i32>(&5); ref_arg::<[i32]>(&[5]); + //~^ the size for values of type `[i32]` cannot be known } diff --git a/src/test/ui/issues/issue-87199.stderr b/src/test/ui/issues/issue-87199.stderr index b0bb1da5793..e3a8e82a09f 100644 --- a/src/test/ui/issues/issue-87199.stderr +++ b/src/test/ui/issues/issue-87199.stderr @@ -5,40 +5,32 @@ LL | fn arg<T: ?Send>(_: T) {} | ^ warning: default bound relaxed for a type parameter, but this does nothing because the given bound is not a default; only `?Sized` is supported - --> $DIR/issue-87199.rs:11:12 + --> $DIR/issue-87199.rs:10:12 | LL | fn ref_arg<T: ?Send>(_: &T) {} | ^ warning: default bound relaxed for a type parameter, but this does nothing because the given bound is not a default; only `?Sized` is supported - --> $DIR/issue-87199.rs:13:13 + --> $DIR/issue-87199.rs:12:13 | LL | fn ret() -> impl Iterator<Item = ()> + ?Send { std::iter::empty() } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -error[E0277]: the size for values of type `impl Iterator+?Sized` cannot be known at compilation time - --> $DIR/issue-87199.rs:13:13 +error[E0277]: the size for values of type `[i32]` cannot be known at compilation time + --> $DIR/issue-87199.rs:18:22 | -LL | fn ret() -> impl Iterator<Item = ()> + ?Send { std::iter::empty() } - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time - | - = help: the trait `Sized` is not implemented for `impl Iterator+?Sized` - = note: the return type of a function must have a statically known size - -error[E0277]: the size for values of type `T` cannot be known at compilation time - --> $DIR/issue-87199.rs:8:18 - | -LL | fn arg<T: ?Send>(_: T) {} - | - ^ doesn't have a size known at compile-time - | | - | this type parameter needs to be `std::marker::Sized` +LL | fn ref_arg<T: ?Send>(_: &T) {} + | - required by this bound in `ref_arg` +... +LL | ref_arg::<[i32]>(&[5]); + | ^^^^ doesn't have a size known at compile-time | - = help: unsized fn params are gated as an unstable feature -help: function arguments must have a statically known size, borrowed types always have a known size + = help: the trait `Sized` is not implemented for `[i32]` +help: consider relaxing the implicit `Sized` restriction | -LL | fn arg<T: ?Send>(_: &T) {} - | ^ +LL | fn ref_arg<T: ?Send + ?Sized>(_: &T) {} + | ^^^^^^^^ -error: aborting due to 2 previous errors; 3 warnings emitted +error: aborting due to previous error; 3 warnings emitted For more information about this error, try `rustc --explain E0277`. |