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Quietly fail if an error has already occurred

This commit is contained in:
Oli Scherer 2023-10-26 11:13:32 +00:00
parent ccb160d343
commit d572729d59
3 changed files with 73 additions and 2 deletions
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5
compiler/rustc_borrowck/src/type_check/free_region_relations.rs
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@ -8,7 +8,7 @@ use rustc_infer::infer::InferCtxt;
use rustc_middle::mir::ConstraintCategory;
use rustc_middle::traits::query::OutlivesBound;
use rustc_middle::ty::{self, RegionVid, Ty};
use rustc_span::{Span, DUMMY_SP};
use rustc_span::{ErrorGuaranteed, Span, DUMMY_SP};
use rustc_trait_selection::traits::query::type_op::{self, TypeOp};
use std::rc::Rc;
use type_op::TypeOpOutput;
@ -318,7 +318,8 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
.param_env
.and(type_op::implied_outlives_bounds::ImpliedOutlivesBounds { ty })
.fully_perform(self.infcx, DUMMY_SP)
.unwrap_or_else(|_| bug!("failed to compute implied bounds {:?}", ty));
.map_err(|_: ErrorGuaranteed| debug!("failed to compute implied bounds {:?}", ty))
.ok()?;
debug!(?bounds, ?constraints);
self.add_outlives_bounds(bounds);
constraints

19
tests/ui/lifetimes/issue-76168-hr-outlives-3.rs Normal file
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@ -0,0 +1,19 @@
// edition:2018
#![feature(unboxed_closures)]
use std::future::Future;
async fn wrapper<F>(f: F)
//~^ ERROR: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
//~| ERROR: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
//~| ERROR: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
where
F:,
for<'a> <i32 as FnOnce<(&'a mut i32,)>>::Output: Future<Output = ()> + 'a,
{
//~^ ERROR: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
let mut i = 41;
&mut i;
}
fn main() {}

51
tests/ui/lifetimes/issue-76168-hr-outlives-3.stderr Normal file
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@ -0,0 +1,51 @@
error[E0277]: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
--> $DIR/issue-76168-hr-outlives-3.rs:6:1
|
LL | / async fn wrapper<F>(f: F)
LL | |
LL | |
LL | |
LL | | where
LL | | F:,
LL | | for<'a> <i32 as FnOnce<(&'a mut i32,)>>::Output: Future<Output = ()> + 'a,
| |______________________________________________________________________________^ expected an `FnOnce<(&'a mut i32,)>` closure, found `i32`
|
= help: the trait `for<'a> FnOnce<(&'a mut i32,)>` is not implemented for `i32`
error[E0277]: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
--> $DIR/issue-76168-hr-outlives-3.rs:6:10
|
LL | async fn wrapper<F>(f: F)
| ^^^^^^^ expected an `FnOnce<(&'a mut i32,)>` closure, found `i32`
|
= help: the trait `for<'a> FnOnce<(&'a mut i32,)>` is not implemented for `i32`
error[E0277]: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
--> $DIR/issue-76168-hr-outlives-3.rs:13:1
|
LL | / {
LL | |
LL | | let mut i = 41;
LL | | &mut i;
LL | | }
| |_^ expected an `FnOnce<(&'a mut i32,)>` closure, found `i32`
|
= help: the trait `for<'a> FnOnce<(&'a mut i32,)>` is not implemented for `i32`
error[E0277]: expected a `FnOnce<(&'a mut i32,)>` closure, found `i32`
--> $DIR/issue-76168-hr-outlives-3.rs:6:1
|
LL | / async fn wrapper<F>(f: F)
LL | |
LL | |
LL | |
LL | | where
LL | | F:,
LL | | for<'a> <i32 as FnOnce<(&'a mut i32,)>>::Output: Future<Output = ()> + 'a,
| |______________________________________________________________________________^ expected an `FnOnce<(&'a mut i32,)>` closure, found `i32`
|
= help: the trait `for<'a> FnOnce<(&'a mut i32,)>` is not implemented for `i32`
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0277`.