add RPITIT tests: method compat auto trait leakage

4 files changed, 224 insertions, 0 deletions

diff --git a/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.current.stderr b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.current.stderr
new file mode 100644
index 00000000000..bf598d62709
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.current.stderr
@@ -0,0 +1,58 @@
+error[E0391]: cycle detected when computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::{anon_assoc#0}`
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+   |
+note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+   = note: ...which requires evaluating trait selection obligation `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo::{opaque#0}: core::marker::Send`...
+note: ...which requires computing type of opaque `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo::{opaque#0}`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+note: ...which requires borrow-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires promoting constants in MIR for `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires checking if `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo` contains FFI-unwind calls...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires building MIR for `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires match-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires type-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: ...which again requires computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::{anon_assoc#0}`, completing the cycle
+note: cycle used when checking that `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>` is well-formed
+  --> $DIR/method-compatability-via-leakage-cycle.rs:17:1
+   |
+LL | impl Trait for u32 {
+   | ^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0391`.
diff --git a/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.next.stderr b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.next.stderr
new file mode 100644
index 00000000000..6bec5bbc063
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.next.stderr
@@ -0,0 +1,122 @@
+error[E0391]: cycle detected when computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::{anon_assoc#0}`
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+   |
+note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo::{opaque#0}`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+note: ...which requires computing type of opaque `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo::{opaque#0}`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+note: ...which requires borrow-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires promoting constants in MIR for `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires checking if `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo` contains FFI-unwind calls...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires building MIR for `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires match-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires type-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: ...which again requires computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::{anon_assoc#0}`, completing the cycle
+note: cycle used when checking that `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>` is well-formed
+  --> $DIR/method-compatability-via-leakage-cycle.rs:17:1
+   |
+LL | impl Trait for u32 {
+   | ^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
+
+error[E0391]: cycle detected when computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::{anon_assoc#0}`
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+   |
+note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo::{opaque#0}`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+note: ...which requires computing type of opaque `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo::{opaque#0}`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:24
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |                        ^^^^^^^^^^
+note: ...which requires borrow-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires promoting constants in MIR for `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires checking if `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo` contains FFI-unwind calls...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires building MIR for `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires match-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires type-checking `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::foo`...
+  --> $DIR/method-compatability-via-leakage-cycle.rs:21:5
+   |
+LL |     fn foo(b: bool) -> impl Sized {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: ...which again requires computing type of `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>::{anon_assoc#0}`, completing the cycle
+note: cycle used when checking that `<impl at $DIR/method-compatability-via-leakage-cycle.rs:17:1: 17:19>` is well-formed
+  --> $DIR/method-compatability-via-leakage-cycle.rs:17:1
+   |
+LL | impl Trait for u32 {
+   | ^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
+   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0391`.
diff --git a/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.rs b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.rs
new file mode 100644
index 00000000000..917820dc2b8
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage-cycle.rs
@@ -0,0 +1,30 @@
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+//@ ignore-compare-mode-next-solver (explicit revisions)
+//@ known-bug: #139788
+
+// Recursively using the trait method inside of an impl in case checking
+// method compatability relies on opaque type leakage currently causes a
+// cycle error.
+
+trait Trait {
+    // desugars to
+    // type Assoc: Sized + Send;
+    // fn foo(b: bool) -> Self::Assoc;
+    fn foo(b: bool) -> impl Sized + Send;
+}
+
+impl Trait for u32 {
+    // desugars to
+    // type Assoc = impl_rpit::<Self>;
+    // fn foo(b: bool) -> Self::Assoc { .. }
+    fn foo(b: bool) -> impl Sized {
+        if b {
+            u32::foo(false)
+        } else {
+            1u32
+        }
+    }
+}
+
+fn main() {}
diff --git a/tests/ui/impl-trait/in-trait/method-compatability-via-leakage.rs b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage.rs
new file mode 100644
index 00000000000..249ec0728c1
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/method-compatability-via-leakage.rs
@@ -0,0 +1,14 @@
+//@ check-pass
+//@ revisions: current next
+//@[next] compile-flags: -Znext-solver
+//@ ignore-compare-mode-next-solver (explicit revisions)
+
+trait Trait {
+    fn foo() -> impl Sized + Send;
+}
+
+impl Trait for u32 {
+    fn foo() -> impl Sized {}
+}
+
+fn main() {}