normalize substs during inlining

src/test/ui/mir/mir-inlining/ice-issue-77306.rs

@@ -0,0 +1,17 @@
+// run-pass
+// compile-flags:-Zmir-opt-level=2
+
+// Previously ICEd because we did not normalize during inlining,
+// see https://github.com/rust-lang/rust/pull/77306 for more discussion.
+
+pub fn write() {
+    create()()
+}
+
+pub fn create() -> impl FnOnce() {
+   || ()
+}
+
+fn main() {
+    write();
+}