Tests: Mark SILOptimizer/propagate_opaque_return_type.swift as unsupported for back deployment.

tshortli · tshortli · commit 3919fe1459fc · 2025-08-26T15:42:54.000-07:00
It requires a deployment target that is too new for back deployment runtime testing.

Resolves rdar://159026084.
diff --git a/test/SILOptimizer/propagate_opaque_return_type.swift b/test/SILOptimizer/propagate_opaque_return_type.swift
@@ -2,6 +2,8 @@
 
 // REQUIRES: executable_test
 
+// UNSUPPORTED: back_deployment_runtime
+
 protocol P {}
 extension P {
   func foo() -> some Sequence<Int> {
