Rollup merge of rust-lang#112908 - spastorino:add-def-id-to-early-bound-region-debug, r=compiler-errors

Print def_id on EarlyBoundRegion debug

It's not the first time that I can't make sense out of the default debug print on `EarlyBoundRegion`. As I was working on rust-lang#112682 I needed this.

I was doing some git archeology and found that we used to print everything https://github.com/spastorino/rust/blob/dfbc9608ce5c9655a36b63f6cc9694f5e4ad9890/src/librustc/util/ppaux.rs#L425-L430 but we lost the ability in some refactor midway.

Author: matthiaskrgr

compiler/rustc_middle/src/ty/sty.rs

@@ -1584,7 +1584,7 @@ pub struct EarlyBoundRegion {
 
 impl fmt::Debug for EarlyBoundRegion {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}, {}", self.index, self.name)
+        write!(f, "{:?}, {}, {}", self.def_id, self.index, self.name)
     }
 }
 

tests/ui/nll/ty-outlives/impl-trait-captures.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `Opaque(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::{opaque#0}), [ReEarlyBound(0, 'a), T, ReEarlyBound(0, 'a)])` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `Opaque(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::{opaque#0}), [ReEarlyBound(DefId(0:9 ~ impl_trait_captures[aeb9]::foo::'a), 0, 'a), T, ReEarlyBound(DefId(0:9 ~ impl_trait_captures[aeb9]::foo::'a), 0, 'a)])` captures lifetime that does not appear in bounds
   --> $DIR/impl-trait-captures.rs:11:5
    |
 LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> {
@@ -8,7 +8,7 @@ LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> {
 LL |     x
    |     ^
    |
-help: to declare that `Opaque(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::{opaque#0}), [ReEarlyBound(0, 'a), T, ReEarlyBound(2, 'a)])` captures `ReFree(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_))`, you can add an explicit `ReFree(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_))` lifetime bound
+help: to declare that `Opaque(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::{opaque#0}), [ReEarlyBound(DefId(0:9 ~ impl_trait_captures[aeb9]::foo::'a), 0, 'a), T, ReEarlyBound(DefId(0:14 ~ impl_trait_captures[aeb9]::foo::{opaque#0}::'a), 2, 'a)])` captures `ReFree(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_))`, you can add an explicit `ReFree(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_))` lifetime bound
    |
 LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> + ReFree(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:12 ~ impl_trait_captures[aeb9]::foo::'_), '_)) {
    |                                      ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++