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Add fix suggestions for E0199, E0200, and E0569

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This commit is contained in:
Nicolas Barrios 2022-10-19 22:06:50 -04:00
parent dcb3761150
commit 770538ef9b
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GPG Key ID: C1DDB7A429E915F7
7 changed files with 84 additions and 0 deletions
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30
compiler/rustc_hir_analysis/src/coherence/unsafety.rs
View File

@ -26,6 +26,12 @@ pub(super) fn check_item(tcx: TyCtxt<'_>, def_id: LocalDefId) {
"implementing the trait `{}` is not unsafe",
trait_ref.print_only_trait_path()
)
.span_suggestion_verbose(
item.span.with_hi(item.span.lo() + rustc_span::BytePos(7)),
"remove `unsafe` from this trait implementation",
"",
rustc_errors::Applicability::MachineApplicable,
)
.emit();
}
@ -37,6 +43,18 @@ pub(super) fn check_item(tcx: TyCtxt<'_>, def_id: LocalDefId) {
"the trait `{}` requires an `unsafe impl` declaration",
trait_ref.print_only_trait_path()
)
.note(format!(
"the trait `{}` enforces invariants that the compiler can't check. \
Review the trait documentation and make sure this implementation \
upholds those invariants before adding the `unsafe` keyword",
trait_ref.print_only_trait_path()
))
.span_suggestion_verbose(
item.span.shrink_to_lo(),
"add `unsafe` to this trait implementation",
"unsafe ",
rustc_errors::Applicability::MaybeIncorrect,
)
.emit();
}
@ -48,6 +66,18 @@ pub(super) fn check_item(tcx: TyCtxt<'_>, def_id: LocalDefId) {
"requires an `unsafe impl` declaration due to `#[{}]` attribute",
attr_name
)
.note(format!(
"the trait `{}` enforces invariants that the compiler can't check. \
Review the trait documentation and make sure this implementation \
upholds those invariants before adding the `unsafe` keyword",
trait_ref.print_only_trait_path()
))
.span_suggestion_verbose(
item.span.shrink_to_lo(),
"add `unsafe` to this trait implementation",
"unsafe ",
rustc_errors::Applicability::MaybeIncorrect,
)
.emit();
}

12
src/test/ui/coherence/coherence-default-trait-impl.stderr
View File

@ -3,12 +3,24 @@ error[E0199]: implementing the trait `MySafeTrait` is not unsafe
|
LL | unsafe impl MySafeTrait for Foo {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
help: remove `unsafe` from this trait implementation
|
LL - unsafe impl MySafeTrait for Foo {}
LL + impl MySafeTrait for Foo {}
|
error[E0200]: the trait `MyUnsafeTrait` requires an `unsafe impl` declaration
--> $DIR/coherence-default-trait-impl.rs:13:1
|
LL | impl MyUnsafeTrait for Foo {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the trait `MyUnsafeTrait` enforces invariants that the compiler can't check. Review the trait documentation and make sure this implementation upholds those invariants before adding the `unsafe` keyword
help: add `unsafe` to this trait implementation
|
LL | unsafe impl MyUnsafeTrait for Foo {}
| ++++++
error: aborting due to 2 previous errors

12
src/test/ui/dropck/dropck-eyepatch-implies-unsafe-impl.stderr
View File

@ -8,6 +8,12 @@ LL | | // (unsafe to access self.1 due to #[may_dangle] on A)
LL | | fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); }
LL | | }
| |_^
|
= note: the trait `Drop` enforces invariants that the compiler can't check. Review the trait documentation and make sure this implementation upholds those invariants before adding the `unsafe` keyword
help: add `unsafe` to this trait implementation
|
LL | unsafe impl<#[may_dangle] A, B: fmt::Debug> Drop for Pt<A, B> {
| ++++++
error[E0569]: requires an `unsafe impl` declaration due to `#[may_dangle]` attribute
--> $DIR/dropck-eyepatch-implies-unsafe-impl.rs:27:1
@ -19,6 +25,12 @@ LL | | // (unsafe to access self.1 due to #[may_dangle] on 'a)
LL | | fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); }
LL | | }
| |_^
|
= note: the trait `Drop` enforces invariants that the compiler can't check. Review the trait documentation and make sure this implementation upholds those invariants before adding the `unsafe` keyword
help: add `unsafe` to this trait implementation
|
LL | unsafe impl<#[may_dangle] 'a, 'b, B: fmt::Debug> Drop for Pr<'a, 'b, B> {
| ++++++
error: aborting due to 2 previous errors

6
src/test/ui/error-codes/E0199.stderr
View File

@ -3,6 +3,12 @@ error[E0199]: implementing the trait `Bar` is not unsafe
|
LL | unsafe impl Bar for Foo { }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
help: remove `unsafe` from this trait implementation
|
LL - unsafe impl Bar for Foo { }
LL + impl Bar for Foo { }
|
error: aborting due to previous error

6
src/test/ui/error-codes/E0200.stderr
View File

@ -3,6 +3,12 @@ error[E0200]: the trait `Bar` requires an `unsafe impl` declaration
|
LL | impl Bar for Foo { }
| ^^^^^^^^^^^^^^^^^^^^
|
= note: the trait `Bar` enforces invariants that the compiler can't check. Review the trait documentation and make sure this implementation upholds those invariants before adding the `unsafe` keyword
help: add `unsafe` to this trait implementation
|
LL | unsafe impl Bar for Foo { }
| ++++++
error: aborting due to previous error

6
src/test/ui/traits/safety-trait-impl-cc.stderr
View File

@ -7,6 +7,12 @@ LL | | panic!();
LL | | }
LL | | }
| |_^
|
= note: the trait `Foo` enforces invariants that the compiler can't check. Review the trait documentation and make sure this implementation upholds those invariants before adding the `unsafe` keyword
help: add `unsafe` to this trait implementation
|
LL | unsafe impl lib::Foo for Bar {
| ++++++
error: aborting due to previous error

12
src/test/ui/traits/safety-trait-impl.stderr
View File

@ -3,12 +3,24 @@ error[E0200]: the trait `UnsafeTrait` requires an `unsafe impl` declaration
|
LL | impl UnsafeTrait for u16 { }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the trait `UnsafeTrait` enforces invariants that the compiler can't check. Review the trait documentation and make sure this implementation upholds those invariants before adding the `unsafe` keyword
help: add `unsafe` to this trait implementation
|
LL | unsafe impl UnsafeTrait for u16 { }
| ++++++
error[E0199]: implementing the trait `SafeTrait` is not unsafe
--> $DIR/safety-trait-impl.rs:16:1
|
LL | unsafe impl SafeTrait for u32 { }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
help: remove `unsafe` from this trait implementation
|
LL - unsafe impl SafeTrait for u32 { }
LL + impl SafeTrait for u32 { }
|
error: aborting due to 2 previous errors