Add a regression test for #104322

src/test/ui/traits/issue-104322.rs

@@ -0,0 +1,80 @@
+// build-pass
+//
+// Tests that overflows do not occur in certain situations
+// related to generic diesel code
+
+use mini_diesel::*;
+
+pub trait HandleDelete<K> {}
+
+pub fn handle_delete<D, R>()
+where
+    R: HasTable,
+    R::Table: HandleDelete<D> + 'static,
+{
+}
+
+impl<K, T> HandleDelete<K> for T
+where
+    T: Table + HasTable<Table = T> + 'static,
+    K: 'static,
+    &'static K: Identifiable<Table = T>,
+    T::PrimaryKey: EqAll<<&'static K as Identifiable>::Id>,
+    T::Query: FilterDsl<<T::PrimaryKey as EqAll<<&'static K as Identifiable>::Id>>::Output>,
+    Filter<T::Query, <T::PrimaryKey as EqAll<<&'static K as Identifiable>::Id>>::Output>:
+        IntoUpdateTarget<Table = T>,
+{
+}
+
+mod mini_diesel {
+    pub trait HasTable {
+        type Table: Table;
+    }
+
+    pub trait Identifiable: HasTable {
+        type Id;
+    }
+
+    pub trait EqAll<Rhs> {
+        type Output;
+    }
+
+    pub trait IntoUpdateTarget: HasTable {
+        type WhereClause;
+    }
+
+    pub trait Query {
+        type SqlType;
+    }
+
+    pub trait AsQuery {
+        type Query: Query;
+    }
+    impl<T: Query> AsQuery for T {
+        type Query = Self;
+    }
+
+    pub trait FilterDsl<Predicate> {
+        type Output;
+    }
+
+    impl<T, Predicate> FilterDsl<Predicate> for T
+    where
+        T: Table,
+        T::Query: FilterDsl<Predicate>,
+    {
+        type Output = Filter<T::Query, Predicate>;
+    }
+
+    pub trait QuerySource {
+        type FromClause;
+    }
+
+    pub trait Table: QuerySource + AsQuery + Sized {
+        type PrimaryKey;
+    }
+
+    pub type Filter<Source, Predicate> = <Source as FilterDsl<Predicate>>::Output;
+}
+
+fn main() {}