Rollup merge of #112163 - bvanjoi:fix-105231-2, r=compiler-errors

fix: inline `predicate_may_hold_fatal` and remove expect call in it

- Fixes #105231
- Discussion: https://github.com/rust-lang/rust/pull/111985#discussion_r1208888821

r? ``@compiler-errors``

2 files changed, 38 insertions, 0 deletions

diff --git a/tests/ui/traits/issue-105231.rs b/tests/ui/traits/issue-105231.rs
new file mode 100644
index 00000000000..74c7afd6b9e
--- /dev/null
+++ b/tests/ui/traits/issue-105231.rs
@@ -0,0 +1,9 @@
+//~ ERROR overflow evaluating the requirement `A<A<A<A<A<A<A<...>>>>>>>: Send`
+struct A<T>(B<T>);
+//~^ ERROR recursive types `A` and `B` have infinite size
+struct B<T>(A<A<T>>);
+trait Foo {}
+impl<T> Foo for T where T: Send {}
+impl Foo for B<u8> {}
+
+fn main() {}
diff --git a/tests/ui/traits/issue-105231.stderr b/tests/ui/traits/issue-105231.stderr
new file mode 100644
index 00000000000..fe20c47c57a
--- /dev/null
+++ b/tests/ui/traits/issue-105231.stderr
@@ -0,0 +1,29 @@
+error[E0072]: recursive types `A` and `B` have infinite size
+  --> $DIR/issue-105231.rs:2:1
+   |
+LL | struct A<T>(B<T>);
+   | ^^^^^^^^^^^ ---- recursive without indirection
+LL |
+LL | struct B<T>(A<A<T>>);
+   | ^^^^^^^^^^^ ------- recursive without indirection
+   |
+help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
+   |
+LL ~ struct A<T>(Box<B<T>>);
+LL |
+LL ~ struct B<T>(Box<A<A<T>>>);
+   |
+
+error[E0275]: overflow evaluating the requirement `A<A<A<A<A<A<A<...>>>>>>>: Send`
+   |
+   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_105231`)
+note: required because it appears within the type `B<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<A<u8>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+  --> $DIR/issue-105231.rs:4:8
+   |
+LL | struct B<T>(A<A<T>>);
+   |        ^
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0072, E0275.
+For more information about an error, try `rustc --explain E0072`.