Add tests for #26448

src/test/ui/issues/issue-26448-1.rs

@@ -0,0 +1,13 @@
+// run-pass
+
+pub trait Foo<T> {
+    fn foo(self) -> T;
+}
+
+impl<'a, T> Foo<T> for &'a str where &'a str: Into<T> {
+    fn foo(self) -> T {
+        panic!();
+    }
+}
+
+fn main() {}

src/test/ui/issues/issue-26448-2.rs

@@ -0,0 +1,21 @@
+// run-pass
+
+pub struct Bar<T> {
+    items: Vec<&'static str>,
+    inner: T,
+}
+
+pub trait IntoBar<T> {
+    fn into_bar(self) -> Bar<T>;
+}
+
+impl<'a, T> IntoBar<T> for &'a str where &'a str: Into<T> {
+    fn into_bar(self) -> Bar<T> {
+        Bar {
+            items: Vec::new(),
+            inner: self.into(),
+        }
+    }
+}
+
+fn main() {}

src/test/ui/issues/issue-26448-3.rs

@@ -0,0 +1,25 @@
+// run-pass
+
+pub struct Item {
+    _inner: &'static str,
+}
+
+pub struct Bar<T> {
+    items: Vec<Item>,
+    inner: T,
+}
+
+pub trait IntoBar<T> {
+    fn into_bar(self) -> Bar<T>;
+}
+
+impl<'a, T> IntoBar<T> for &'a str where &'a str: Into<T> {
+    fn into_bar(self) -> Bar<T> {
+        Bar {
+            items: Vec::new(),
+            inner: self.into(),
+        }
+    }
+}
+
+fn main() {}