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-rw-r--r--src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-90612.rs43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-90612.rs b/src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-90612.rs
new file mode 100644
index 000000000..e150ecfe9
--- /dev/null
+++ b/src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-90612.rs
@@ -0,0 +1,43 @@
+// check-pass
+
+#![feature(generic_associated_types)]
+
+use std::marker::PhantomData;
+
+trait Family: Sized {
+ type Item<'a>;
+
+ fn apply_all<F>(&self, f: F)
+ where
+ F: FamilyItemFn<Self> { }
+}
+
+struct Array<T>(PhantomData<T>);
+
+impl<T: 'static> Family for Array<T> {
+ type Item<'a> = &'a T;
+}
+
+trait FamilyItemFn<T: Family> {
+ fn apply(&self, item: T::Item<'_>);
+}
+
+impl<T, F> FamilyItemFn<T> for F
+where
+ T: Family,
+ for<'a> F: Fn(T::Item<'a>)
+{
+ fn apply(&self, item: T::Item<'_>) {
+ (*self)(item);
+ }
+}
+
+fn process<T: 'static>(array: Array<T>) {
+ // Works
+ array.apply_all(|x: &T| { });
+
+ // ICE: NoSolution
+ array.apply_all(|x: <Array<T> as Family>::Item<'_>| { });
+}
+
+fn main() {}