Rollup merge of #72019 - matthewjasper:dont-skip-binder, r=davidtwco

Fix debug assertion in error code

Closes #70813

2 files changed, 36 insertions, 0 deletions

diff --git a/src/test/ui/suggestions/imm-ref-trait-object-literal-bound-regions.rs b/src/test/ui/suggestions/imm-ref-trait-object-literal-bound-regions.rs
new file mode 100644
index 00000000000..319789c4ec2
--- /dev/null
+++ b/src/test/ui/suggestions/imm-ref-trait-object-literal-bound-regions.rs
@@ -0,0 +1,18 @@
+// Regression test for #70813 (this used to trigger a debug assertion)
+
+trait Trait {}
+
+struct S;
+
+impl<'a> Trait for &'a mut S {}
+
+fn foo<X>(_: X)
+where
+    for<'b> &'b X: Trait,
+{
+}
+
+fn main() {
+    let s = S;
+    foo::<S>(s); //~ ERROR the trait bound `for<'b> &'b S: Trait` is not satisfied
+}
diff --git a/src/test/ui/suggestions/imm-ref-trait-object-literal-bound-regions.stderr b/src/test/ui/suggestions/imm-ref-trait-object-literal-bound-regions.stderr
new file mode 100644
index 00000000000..83de3c4cfe0
--- /dev/null
+++ b/src/test/ui/suggestions/imm-ref-trait-object-literal-bound-regions.stderr
@@ -0,0 +1,18 @@
+error[E0277]: the trait bound `for<'b> &'b S: Trait` is not satisfied
+  --> $DIR/imm-ref-trait-object-literal-bound-regions.rs:17:5
+   |
+LL | fn foo<X>(_: X)
+   |    --- required by a bound in this
+LL | where
+LL |     for<'b> &'b X: Trait,
+   |                    ----- required by this bound in `foo`
+...
+LL |     foo::<S>(s);
+   |     ^^^^^^^^ the trait `for<'b> Trait` is not implemented for `&'b S`
+   |
+   = help: the following implementations were found:
+             <&'a mut S as Trait>
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.