Skip to content

Shorten output of E0391 #46282

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Nov 28, 2017
Merged

Shorten output of E0391 #46282

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
aabb604
Move "auto trait leak" impl-trait cycle dependency test to ui
estebank Nov 26, 2017
0b2d21e
Make impl-trait ciclical reference error point to def_span
estebank Nov 26, 2017
8a93dec
Make main span in impl-trait ciclic reference point to def_span
estebank Nov 26, 2017
487daab
Fix test
estebank Nov 27, 2017
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 5 additions & 4 deletions src/librustc/ty/maps/plumbing.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -81,17 +81,18 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
// (And cycle errors around impls tend to occur during the
// collect/coherence phases anyhow.)
item_path::with_forced_impl_filename_line(|| {
let span = self.sess.codemap().def_span(span);
let mut err =
struct_span_err!(self.sess, span, E0391,
"unsupported cyclic reference between types/traits detected");
err.span_label(span, "cyclic reference");

err.span_note(stack[0].0, &format!("the cycle begins when {}...",
stack[0].1.describe(self)));
err.span_note(self.sess.codemap().def_span(stack[0].0),
&format!("the cycle begins when {}...", stack[0].1.describe(self)));

for &(span, ref query) in &stack[1..] {
err.span_note(span, &format!("...which then requires {}...",
query.describe(self)));
err.span_note(self.sess.codemap().def_span(span),
&format!("...which then requires {}...", query.describe(self)));
}

err.note(&format!("...which then again requires {}, completing the cycle.",
Expand Down
0 ...ompile-fail/impl-trait/auto-trait-leak.rs → src/test/ui/impl-trait/auto-trait-leak.rs
View file
Open in desktop
File renamed without changes.
52 changes: 52 additions & 0 deletions src/test/ui/impl-trait/auto-trait-leak.stderr
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,52 @@
error[E0277]: the trait bound `std::rc::Rc<std::cell::Cell<i32>>: std::marker::Send` is not satisfied in `impl std::ops::Fn<(i32,)>`
--> $DIR/auto-trait-leak.rs:27:5
|
27 | send(before());
| ^^^^ `std::rc::Rc<std::cell::Cell<i32>>` cannot be sent between threads safely
|
= help: within `impl std::ops::Fn<(i32,)>`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<std::cell::Cell<i32>>`
= note: required because it appears within the type `[closure@$DIR/auto-trait-leak.rs:21:5: 21:22 p:std::rc::Rc<std::cell::Cell<i32>>]`
= note: required because it appears within the type `impl std::ops::Fn<(i32,)>`
= note: required by `send`

error[E0277]: the trait bound `std::rc::Rc<std::cell::Cell<i32>>: std::marker::Send` is not satisfied in `impl std::ops::Fn<(i32,)>`
--> $DIR/auto-trait-leak.rs:34:5
|
34 | send(after());
| ^^^^ `std::rc::Rc<std::cell::Cell<i32>>` cannot be sent between threads safely
|
= help: within `impl std::ops::Fn<(i32,)>`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<std::cell::Cell<i32>>`
= note: required because it appears within the type `[closure@$DIR/auto-trait-leak.rs:46:5: 46:22 p:std::rc::Rc<std::cell::Cell<i32>>]`
= note: required because it appears within the type `impl std::ops::Fn<(i32,)>`
= note: required by `send`

error[E0391]: unsupported cyclic reference between types/traits detected
--> $DIR/auto-trait-leak.rs:52:1
|
52 | fn cycle1() -> impl Clone {
| ^^^^^^^^^^^^^^^^^^^^^^^^^ cyclic reference
|
note: the cycle begins when processing `cycle1`...
--> $DIR/auto-trait-leak.rs:52:1
|
52 | fn cycle1() -> impl Clone {
| ^^^^^^^^^^^^^^^^^^^^^^^^^
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Actual output differs from expected output. Please update.

 error[E0391]: unsupported cyclic reference between types/traits detected
   --> $DIR/auto-trait-leak.rs:52:1
    |
-52 | fn cycle1() -> impl Clone {
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^ cyclic reference
+52 |   fn cycle1() -> impl Clone {
+   |  _-^^^^^^^^^^^^^^^^^^^^^^^^
+53 | |     //~^ ERROR unsupported cyclic reference between types/traits detected
+54 | |     //~| cyclic reference
+55 | |     //~| NOTE the cycle begins when processing `cycle1`...
+...  |
+60 | |     Rc::new(Cell::new(5))
+61 | | }
+   | |_- cyclic reference

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Missed the label. Done.

note: ...which then requires processing `cycle2::{{impl-Trait}}`...
--> $DIR/auto-trait-leak.rs:63:16
|
63 | fn cycle2() -> impl Clone {
| ^^^^^^^^^^
note: ...which then requires processing `cycle2`...
--> $DIR/auto-trait-leak.rs:63:1
|
63 | fn cycle2() -> impl Clone {
| ^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which then requires processing `cycle1::{{impl-Trait}}`...
--> $DIR/auto-trait-leak.rs:52:16
|
52 | fn cycle1() -> impl Clone {
| ^^^^^^^^^^
= note: ...which then again requires processing `cycle1`, completing the cycle.

error: aborting due to 3 previous errors

2 changes: 1 addition & 1 deletion src/test/ui/resolve/issue-23305.stderr
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ note: the cycle begins when processing `<impl at $DIR/issue-23305.rs:15:1: 15:20
--> $DIR/issue-23305.rs:15:1
|
15 | impl ToNbt<Self> {}
| ^^^^^^^^^^^^^^^^^^^
| ^^^^^^^^^^^^^^^^
= note: ...which then again requires processing `<impl at $DIR/issue-23305.rs:15:1: 15:20>`, completing the cycle.

error: aborting due to previous error
Expand Down