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Auto merge of #87628 - estebank:unmet-explicit-lifetime-bound, r=oli-obk

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Point at unmet explicit lifetime obligation bound

r? `@oli-obk`

Split off of #85799.
This commit is contained in:
bors 2021-08-02 23:16:40 +00:00
commit f63ab6cfa2
24 changed files with 238 additions and 55 deletions
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25
compiler/rustc_infer/src/infer/error_reporting/mod.rs
View File

@ -89,16 +89,17 @@ pub(super) fn note_and_explain_region(
prefix: &str,
region: ty::Region<'tcx>,
suffix: &str,
alt_span: Option<Span>,
) {
let (description, span) = match *region {
ty::ReEarlyBound(_) | ty::ReFree(_) | ty::ReStatic => {
msg_span_from_free_region(tcx, region)
msg_span_from_free_region(tcx, region, alt_span)
}
ty::ReEmpty(ty::UniverseIndex::ROOT) => ("the empty lifetime".to_owned(), None),
ty::ReEmpty(ty::UniverseIndex::ROOT) => ("the empty lifetime".to_owned(), alt_span),
// uh oh, hope no user ever sees THIS
ty::ReEmpty(ui) => (format!("the empty lifetime in universe {:?}", ui), None),
ty::ReEmpty(ui) => (format!("the empty lifetime in universe {:?}", ui), alt_span),
ty::RePlaceholder(_) => return,
@ -108,7 +109,7 @@ pub(super) fn note_and_explain_region(
// We shouldn't really be having unification failures with ReVar
// and ReLateBound though.
ty::ReVar(_) | ty::ReLateBound(..) | ty::ReErased => {
(format!("lifetime {:?}", region), None)
(format!("lifetime {:?}", region), alt_span)
}
};
@ -122,7 +123,7 @@ pub(super) fn note_and_explain_free_region(
region: ty::Region<'tcx>,
suffix: &str,
) {
let (description, span) = msg_span_from_free_region(tcx, region);
let (description, span) = msg_span_from_free_region(tcx, region, None);
emit_msg_span(err, prefix, description, span, suffix);
}
@ -130,14 +131,15 @@ pub(super) fn note_and_explain_free_region(
fn msg_span_from_free_region(
tcx: TyCtxt<'tcx>,
region: ty::Region<'tcx>,
alt_span: Option<Span>,
) -> (String, Option<Span>) {
match *region {
ty::ReEarlyBound(_) | ty::ReFree(_) => {
msg_span_from_early_bound_and_free_regions(tcx, region)
}
ty::ReStatic => ("the static lifetime".to_owned(), None),
ty::ReEmpty(ty::UniverseIndex::ROOT) => ("an empty lifetime".to_owned(), None),
ty::ReEmpty(ui) => (format!("an empty lifetime in universe {:?}", ui), None),
ty::ReStatic => ("the static lifetime".to_owned(), alt_span),
ty::ReEmpty(ty::UniverseIndex::ROOT) => ("an empty lifetime".to_owned(), alt_span),
ty::ReEmpty(ui) => (format!("an empty lifetime in universe {:?}", ui), alt_span),
_ => bug!("{:?}", region),
}
}
@ -319,6 +321,7 @@ pub fn unexpected_hidden_region_diagnostic(
&format!("hidden type `{}` captures ", hidden_ty),
hidden_region,
"",
None,
);
}
}
@ -2303,8 +2306,9 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
&format!("{} must be valid for ", labeled_user_string),
sub,
"...",
None,
);
if let Some(infer::RelateParamBound(_, t)) = origin {
if let Some(infer::RelateParamBound(_, t, _)) = origin {
let return_impl_trait = self
.in_progress_typeck_results
.map(|typeck_results| typeck_results.borrow().hir_owner)
@ -2350,6 +2354,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"first, the lifetime cannot outlive ",
sup_region,
"...",
None,
);
debug!("report_sub_sup_conflict: var_origin={:?}", var_origin);
@ -2376,6 +2381,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"...but the lifetime must also be valid for ",
sub_region,
"...",
None,
);
err.span_note(
sup_trace.cause.span,
@ -2397,6 +2403,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"but, the lifetime must be valid for ",
sub_region,
"...",
None,
);
self.note_region_origin(&mut err, &sub_origin);

2
compiler/rustc_infer/src/infer/error_reporting/nice_region_error/mismatched_static_lifetime.rs
View File

@ -43,7 +43,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
multi_span
.push_span_label(binding_span, "introduces a `'static` lifetime requirement".into());
err.span_note(multi_span, "because this has an unmet lifetime requirement");
note_and_explain_region(self.tcx(), &mut err, "", sup, "...");
note_and_explain_region(self.tcx(), &mut err, "", sup, "...", Some(binding_span));
if let Some(impl_node) = self.tcx().hir().get_if_local(*impl_def_id) {
// If an impl is local, then maybe this isn't what they want. Try to
// be as helpful as possible with implicit lifetimes.

82
compiler/rustc_infer/src/infer/error_reporting/note.rs
View File

@ -74,14 +74,18 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
),
);
}
infer::RelateParamBound(span, t) => {
infer::RelateParamBound(span, t, opt_span) => {
label_or_note(
span,
&format!(
"...so that the type `{}` will meet its required lifetime bounds",
self.ty_to_string(t)
"...so that the type `{}` will meet its required lifetime bounds{}",
self.ty_to_string(t),
if opt_span.is_some() { "..." } else { "" },
),
);
if let Some(span) = opt_span {
err.span_note(span, "...that is required by this bound");
}
}
infer::RelateRegionParamBound(span) => {
label_or_note(
@ -117,6 +121,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"",
sup,
" doesn't meet the lifetime requirements",
None,
);
}
(_, ty::RePlaceholder(_)) => {
@ -126,16 +131,18 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"the required lifetime does not necessarily outlive ",
sub,
"",
None,
);
}
_ => {
note_and_explain_region(self.tcx, &mut err, "", sup, "...");
note_and_explain_region(self.tcx, &mut err, "", sup, "...", None);
note_and_explain_region(
self.tcx,
&mut err,
"...does not necessarily outlive ",
sub,
"",
None,
);
}
}
@ -154,6 +161,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"...the reference is valid for ",
sub,
"...",
None,
);
note_and_explain_region(
self.tcx,
@ -161,6 +169,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"...but the borrowed content is only valid for ",
sup,
"",
None,
);
err
}
@ -179,6 +188,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"...the borrowed pointer is valid for ",
sub,
"...",
None,
);
note_and_explain_region(
self.tcx,
@ -186,6 +196,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
&format!("...but `{}` is only valid for ", var_name),
sup,
"",
None,
);
err
}
@ -197,17 +208,25 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"lifetime of the source pointer does not outlive lifetime bound of the \
object type"
);
note_and_explain_region(self.tcx, &mut err, "object type is valid for ", sub, "");
note_and_explain_region(
self.tcx,
&mut err,
"object type is valid for ",
sub,
"",
None,
);
note_and_explain_region(
self.tcx,
&mut err,
"source pointer is only valid for ",
sup,
"",
None,
);
err
}
infer::RelateParamBound(span, ty) => {
infer::RelateParamBound(span, ty, opt_span) => {
let mut err = struct_span_err!(
self.tcx.sess,
span,
@ -216,10 +235,22 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
self.ty_to_string(ty)
);
match *sub {
ty::ReStatic => {
note_and_explain_region(self.tcx, &mut err, "type must satisfy ", sub, "")
}
_ => note_and_explain_region(self.tcx, &mut err, "type must outlive ", sub, ""),
ty::ReStatic => note_and_explain_region(
self.tcx,
&mut err,
"type must satisfy ",
sub,
if opt_span.is_some() { " as required by this binding" } else { "" },
opt_span,
),
_ => note_and_explain_region(
self.tcx,
&mut err,
"type must outlive ",
sub,
if opt_span.is_some() { " as required by this binding" } else { "" },
opt_span,
),
}
err
}
@ -232,6 +263,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"lifetime parameter instantiated with ",
sup,
"",
None,
);
note_and_explain_region(
self.tcx,
@ -239,6 +271,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"but lifetime parameter must outlive ",
sub,
"",
None,
);
err
}
@ -255,6 +288,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"the return value is only valid for ",
sup,
"",
None,
);
err
}
@ -266,8 +300,22 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"a value of type `{}` is borrowed for too long",
self.ty_to_string(ty)
);
note_and_explain_region(self.tcx, &mut err, "the type is valid for ", sub, "");
note_and_explain_region(self.tcx, &mut err, "but the borrow lasts for ", sup, "");
note_and_explain_region(
self.tcx,
&mut err,
"the type is valid for ",
sub,
"",
None,
);
note_and_explain_region(
self.tcx,
&mut err,
"but the borrow lasts for ",
sup,
"",
None,
);
err
}
infer::ReferenceOutlivesReferent(ty, span) => {
@ -278,13 +326,21 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"in type `{}`, reference has a longer lifetime than the data it references",
self.ty_to_string(ty)
);
note_and_explain_region(self.tcx, &mut err, "the pointer is valid for ", sub, "");
note_and_explain_region(
self.tcx,
&mut err,
"the pointer is valid for ",
sub,
"",
None,
);
note_and_explain_region(
self.tcx,
&mut err,
"but the referenced data is only valid for ",
sup,
"",
None,
);
err
}

4
compiler/rustc_infer/src/infer/mod.rs
View File

@ -375,7 +375,7 @@ pub enum SubregionOrigin<'tcx> {
/// Some type parameter was instantiated with the given type,
/// and that type must outlive some region.
RelateParamBound(Span, Ty<'tcx>),
RelateParamBound(Span, Ty<'tcx>, Option<Span>),
/// The given region parameter was instantiated with a region
/// that must outlive some other region.
@ -1705,7 +1705,7 @@ impl<'tcx> SubregionOrigin<'tcx> {
match *self {
Subtype(ref a) => a.span(),
RelateObjectBound(a) => a,
RelateParamBound(a, _) => a,
RelateParamBound(a, ..) => a,
RelateRegionParamBound(a) => a,
Reborrow(a) => a,
ReborrowUpvar(a, _) => a,

11
compiler/rustc_infer/src/infer/outlives/obligations.rs
View File

@ -64,7 +64,7 @@ use crate::infer::outlives::verify::VerifyBoundCx;
use crate::infer::{
self, GenericKind, InferCtxt, RegionObligation, SubregionOrigin, UndoLog, VerifyBound,
};
use crate::traits::ObligationCause;
use crate::traits::{ObligationCause, ObligationCauseCode};
use rustc_middle::ty::outlives::Component;
use rustc_middle::ty::subst::GenericArgKind;
use rustc_middle::ty::{self, Region, Ty, TyCtxt, TypeFoldable};
@ -99,7 +99,14 @@ impl<'cx, 'tcx> InferCtxt<'cx, 'tcx> {
cause: &ObligationCause<'tcx>,
) {
let origin = SubregionOrigin::from_obligation_cause(cause, || {
infer::RelateParamBound(cause.span, sup_type)
infer::RelateParamBound(
cause.span,
sup_type,
match cause.code.peel_derives() {
ObligationCauseCode::BindingObligation(_, span) => Some(*span),
_ => None,
},
)
});
self.register_region_obligation(

2
compiler/rustc_mir/src/borrow_check/type_check/constraint_conversion.rs
View File

@ -99,7 +99,7 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> {
GenericArgKind::Type(t1) => {
// we don't actually use this for anything, but
// the `TypeOutlives` code needs an origin.
let origin = infer::RelateParamBound(DUMMY_SP, t1);
let origin = infer::RelateParamBound(DUMMY_SP, t1, None);
TypeOutlives::new(
&mut *self,

8
src/test/ui/feature-gates/feature-gate-infer_static_outlives_requirements.stderr
View File

@ -4,7 +4,13 @@ error[E0310]: the parameter type `U` may not live long enough
LL | struct Foo<U> {
| - help: consider adding an explicit lifetime bound...: `U: 'static`
LL | bar: Bar<U>
| ^^^^^^ ...so that the type `U` will meet its required lifetime bounds
| ^^^^^^ ...so that the type `U` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/feature-gate-infer_static_outlives_requirements.rs:7:15
|
LL | struct Bar<T: 'static> {
| ^^^^^^^
error: aborting due to previous error

16
src/test/ui/generic-associated-types/issue-86483.stderr
View File

@ -11,7 +11,13 @@ LL | | {
... |
LL | |
LL | | }
| |_^ ...so that the type `T` will meet its required lifetime bounds
| |_^ ...so that the type `T` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/issue-86483.rs:7:16
|
LL | for<'a> T: 'a,
| ^^
error[E0311]: the parameter type `T` may not live long enough
--> $DIR/issue-86483.rs:9:5
@ -20,7 +26,13 @@ LL | pub trait IceIce<T>
| - help: consider adding an explicit lifetime bound...: `T: 'a`
...
LL | type Ice<'v>: IntoIterator<Item = &'v T>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/issue-86483.rs:7:16
|
LL | for<'a> T: 'a,
| ^^
error[E0309]: the parameter type `T` may not live long enough
--> $DIR/issue-86483.rs:9:32

8
src/test/ui/generic-associated-types/unsatisfied-outlives-bound.stderr
View File

@ -4,7 +4,7 @@ error[E0477]: the type `&'b ()` does not fulfill the required lifetime
LL | type Item<'a> = &'b ();
| ^^^^^^^^^^^^^^^^^^^^^^^
|
note: type must outlive the lifetime `'a` as defined on the associated item at 8:15
note: type must outlive the lifetime `'a` as defined on the associated item at 8:15 as required by this binding
--> $DIR/unsatisfied-outlives-bound.rs:8:15
|
LL | type Item<'a> = &'b ();
@ -16,7 +16,11 @@ error[E0477]: the type `&'a ()` does not fulfill the required lifetime
LL | type Item<'a> = &'a ();
| ^^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/unsatisfied-outlives-bound.rs:13:20
|
LL | type Item<'a>: 'static;
| ^^^^^^^
error: aborting due to 2 previous errors

6
src/test/ui/issues/issue-54943.stderr
View File

@ -4,7 +4,11 @@ error[E0477]: the type `&'a u32` does not fulfill the required lifetime
LL | let x = foo::<&'a u32>();
| ^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/issue-54943.rs:1:11
|
LL | fn foo<T: 'static>() { }
| ^^^^^^^
error: aborting due to previous error

6
src/test/ui/kindck/kindck-send-object1.stderr
View File

@ -16,7 +16,11 @@ error[E0477]: the type `&'a (dyn Dummy + Sync + 'a)` does not fulfill the requir
LL | assert_send::<&'a (dyn Dummy + Sync)>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/kindck-send-object1.rs:5:23
|
LL | fn assert_send<T:Send+'static>() { }
| ^^^^^^^
error[E0277]: `(dyn Dummy + 'a)` cannot be sent between threads safely
--> $DIR/kindck-send-object1.rs:29:5

7
src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-bound.stderr
View File

@ -5,7 +5,12 @@ LL | bar::<T::Output>()
| ^^^^^^^^^^^^^^^^
|
= help: consider adding an explicit lifetime bound `<T as MyTrait<'a>>::Output: 'a`...
= note: ...so that the type `<T as MyTrait<'a>>::Output` will meet its required lifetime bounds
= note: ...so that the type `<T as MyTrait<'a>>::Output` will meet its required lifetime bounds...
note: ...that is required by this bound
--> $DIR/projection-where-clause-env-wrong-bound.rs:29:8
|
LL | T: 'a,
| ^^
error: aborting due to previous error

7
src/test/ui/nll/ty-outlives/projection-where-clause-env-wrong-lifetime.stderr
View File

@ -5,7 +5,12 @@ LL | bar::<<T as MyTrait<'a>>::Output>()
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: consider adding an explicit lifetime bound `<T as MyTrait<'a>>::Output: 'a`...
= note: ...so that the type `<T as MyTrait<'a>>::Output` will meet its required lifetime bounds
= note: ...so that the type `<T as MyTrait<'a>>::Output` will meet its required lifetime bounds...
note: ...that is required by this bound
--> $DIR/projection-where-clause-env-wrong-lifetime.rs:20:8
|
LL | T: 'a,
| ^^
error: aborting due to previous error

8
src/test/ui/regions/regions-assoc-type-region-bound-in-trait-not-met.stderr
View File

@ -4,7 +4,11 @@ error[E0477]: the type `&'a i32` does not fulfill the required lifetime
LL | type Value = &'a i32;
| ^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-assoc-type-region-bound-in-trait-not-met.rs:5:17
|
LL | type Value: 'a;
| ^^
error[E0477]: the type `&'a i32` does not fulfill the required lifetime
--> $DIR/regions-assoc-type-region-bound-in-trait-not-met.rs:20:5
@ -12,7 +16,7 @@ error[E0477]: the type `&'a i32` does not fulfill the required lifetime
LL | type Value = &'a i32;
| ^^^^^^^^^^^^^^^^^^^^^
|
note: type must outlive the lifetime `'b` as defined on the impl at 19:10
note: type must outlive the lifetime `'b` as defined on the impl at 19:10 as required by this binding
--> $DIR/regions-assoc-type-region-bound-in-trait-not-met.rs:19:10
|
LL | impl<'a, 'b> Foo<'b> for &'a i64 {

6
src/test/ui/regions/regions-assoc-type-static-bound-in-trait-not-met.stderr
View File

@ -4,7 +4,11 @@ error[E0477]: the type `&'a i32` does not fulfill the required lifetime
LL | type Value = &'a i32;
| ^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-assoc-type-static-bound-in-trait-not-met.rs:5:17
|
LL | type Value: 'static;
| ^^^^^^^
error: aborting due to previous error

36
src/test/ui/regions/regions-bounded-by-trait-requiring-static.stderr
View File

@ -4,7 +4,11 @@ error[E0477]: the type `&'a isize` does not fulfill the required lifetime
LL | assert_send::<&'a isize>();
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-bounded-by-trait-requiring-static.rs:6:18
|
LL | fn assert_send<T:'static>() { }
| ^^^^^^^
error[E0477]: the type `&'a str` does not fulfill the required lifetime
--> $DIR/regions-bounded-by-trait-requiring-static.rs:26:5
@ -12,7 +16,11 @@ error[E0477]: the type `&'a str` does not fulfill the required lifetime
LL | assert_send::<&'a str>();
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-bounded-by-trait-requiring-static.rs:6:18
|
LL | fn assert_send<T:'static>() { }
| ^^^^^^^
error[E0477]: the type `&'a [isize]` does not fulfill the required lifetime
--> $DIR/regions-bounded-by-trait-requiring-static.rs:30:5
@ -20,7 +28,11 @@ error[E0477]: the type `&'a [isize]` does not fulfill the required lifetime
LL | assert_send::<&'a [isize]>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-bounded-by-trait-requiring-static.rs:6:18
|
LL | fn assert_send<T:'static>() { }
| ^^^^^^^
error[E0477]: the type `Box<&'a isize>` does not fulfill the required lifetime
--> $DIR/regions-bounded-by-trait-requiring-static.rs:44:5
@ -28,7 +40,11 @@ error[E0477]: the type `Box<&'a isize>` does not fulfill the required lifetime
LL | assert_send::<Box<&'a isize>>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-bounded-by-trait-requiring-static.rs:6:18
|
LL | fn assert_send<T:'static>() { }
| ^^^^^^^
error[E0477]: the type `*const &'a isize` does not fulfill the required lifetime
--> $DIR/regions-bounded-by-trait-requiring-static.rs:55:5
@ -36,7 +52,11 @@ error[E0477]: the type `*const &'a isize` does not fulfill the required lifetime
LL | assert_send::<*const &'a isize>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-bounded-by-trait-requiring-static.rs:6:18
|
LL | fn assert_send<T:'static>() { }
| ^^^^^^^
error[E0477]: the type `*mut &'a isize` does not fulfill the required lifetime
--> $DIR/regions-bounded-by-trait-requiring-static.rs:59:5
@ -44,7 +64,11 @@ error[E0477]: the type `*mut &'a isize` does not fulfill the required lifetime
LL | assert_send::<*mut &'a isize>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: type must satisfy the static lifetime
note: type must satisfy the static lifetime as required by this binding
--> $DIR/regions-bounded-by-trait-requiring-static.rs:6:18
|
LL | fn assert_send<T:'static>() { }
| ^^^^^^^
error: aborting due to 6 previous errors

8
src/test/ui/regions/regions-close-object-into-object-5.stderr
View File

@ -23,7 +23,13 @@ LL | fn f<'a, T, U>(v: Box<A<T> + 'static>) -> Box<X + 'static> {
| - help: consider adding an explicit lifetime bound...: `T: 'static`
LL | // oh dear!
LL | box B(&*v) as Box<X>
| ^^^^^^ ...so that the type `T` will meet its required lifetime bounds
| ^^^^^^ ...so that the type `T` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/regions-close-object-into-object-5.rs:9:17
|
LL | struct B<'a, T: 'a>(&'a (A<T> + 'a));
| ^^
error[E0310]: the parameter type `T` may not live long enough
--> $DIR/regions-close-object-into-object-5.rs:17:11

7
src/test/ui/regions/regions-infer-bound-from-trait-self.stderr
View File

@ -5,7 +5,12 @@ LL | check_bound(x, self)
| ^^^^^^^^^^^
|
= help: consider adding an explicit lifetime bound `Self: 'a`...
= note: ...so that the type `Self` will meet its required lifetime bounds
= note: ...so that the type `Self` will meet its required lifetime bounds...
note: ...that is required by this bound
--> $DIR/regions-infer-bound-from-trait-self.rs:12:21
|
LL | fn check_bound<'a,A:'a>(x: Inv<'a>, a: A) { }
| ^^
error: aborting due to previous error

16
src/test/ui/regions/regions-infer-bound-from-trait.stderr
View File

@ -4,7 +4,13 @@ error[E0309]: the parameter type `A` may not live long enough
LL | fn bar1<'a,A>(x: Inv<'a>, a: A) {
| - help: consider adding an explicit lifetime bound...: `A: 'a`
LL | check_bound(x, a)
| ^^^^^^^^^^^ ...so that the type `A` will meet its required lifetime bounds
| ^^^^^^^^^^^ ...so that the type `A` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/regions-infer-bound-from-trait.rs:12:21
|
LL | fn check_bound<'a,A:'a>(x: Inv<'a>, a: A) { }
| ^^
error[E0309]: the parameter type `A` may not live long enough
--> $DIR/regions-infer-bound-from-trait.rs:37:5
@ -12,7 +18,13 @@ error[E0309]: the parameter type `A` may not live long enough
LL | fn bar2<'a,'b,A:Is<'b>>(x: Inv<'a>, y: Inv<'b>, a: A) {
| -- help: consider adding an explicit lifetime bound...: `A: 'a +`
LL | check_bound(x, a)
| ^^^^^^^^^^^ ...so that the type `A` will meet its required lifetime bounds
| ^^^^^^^^^^^ ...so that the type `A` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/regions-infer-bound-from-trait.rs:12:21
|
LL | fn check_bound<'a,A:'a>(x: Inv<'a>, a: A) { }
| ^^
error: aborting due to 2 previous errors

8
src/test/ui/rfc-2093-infer-outlives/dont-infer-static.stderr
View File

@ -4,7 +4,13 @@ error[E0310]: the parameter type `U` may not live long enough
LL | struct Foo<U> {
| - help: consider adding an explicit lifetime bound...: `U: 'static`
LL | bar: Bar<U>
| ^^^^^^ ...so that the type `U` will meet its required lifetime bounds
| ^^^^^^ ...so that the type `U` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/dont-infer-static.rs:10:15
|
LL | struct Bar<T: 'static> {
| ^^^^^^^
error: aborting due to previous error

8
src/test/ui/rfc-2093-infer-outlives/regions-struct-not-wf.stderr
View File

@ -12,7 +12,13 @@ error[E0309]: the parameter type `T` may not live long enough
LL | impl<'a, T> Trait<'a, T> for u32 {
| - help: consider adding an explicit lifetime bound...: `T: 'a`
LL | type Out = RefOk<'a, T>;
| ^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
| ^^^^^^^^^^^^^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/regions-struct-not-wf.rs:16:20
|
LL | struct RefOk<'a, T:'a> {
| ^^
error[E0491]: in type `&'a &'b T`, reference has a longer lifetime than the data it references
--> $DIR/regions-struct-not-wf.rs:25:5

2
src/test/ui/suggestions/suggest-impl-trait-lifetime.fixed
View File

@ -9,7 +9,7 @@ fn foo(d: impl Debug + 'static) {
//~| NOTE ...so that the type `impl Debug` will meet its required lifetime bounds
}
fn bar(d: impl Debug + 'static) {
fn bar(d: impl Debug + 'static) { //~ NOTE ...that is required by this bound
println!("{:?}", d)
}

2
src/test/ui/suggestions/suggest-impl-trait-lifetime.rs
View File

@ -9,7 +9,7 @@ fn foo(d: impl Debug) {
//~| NOTE ...so that the type `impl Debug` will meet its required lifetime bounds
}
fn bar(d: impl Debug + 'static) {
fn bar(d: impl Debug + 'static) { //~ NOTE ...that is required by this bound
println!("{:?}", d)
}

8
src/test/ui/suggestions/suggest-impl-trait-lifetime.stderr
View File

@ -5,7 +5,13 @@ LL | fn foo(d: impl Debug) {
| ---------- help: consider adding an explicit lifetime bound...: `impl Debug + 'static`
LL |
LL | bar(d);
| ^^^ ...so that the type `impl Debug` will meet its required lifetime bounds
| ^^^ ...so that the type `impl Debug` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/suggest-impl-trait-lifetime.rs:12:24
|
LL | fn bar(d: impl Debug + 'static) {
| ^^^^^^^
error: aborting due to previous error