From 83a6c1a618085deb28f23b1f99c4fe7987eee0a7 Mon Sep 17 00:00:00 2001
From: Allan Shortlidge <shortlidge@apple.com>
Date: Tue, 26 Aug 2025 15:27:56 -0700
Subject: [PATCH] Tests: Make Constraints/result_builder.swift compatible with
 back deployment.

Resolves rdar://159025996.
---
 test/Constraints/result_builder.swift | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/test/Constraints/result_builder.swift b/test/Constraints/result_builder.swift
index b7a63a80a29..3a7a7c2e433 100644
--- a/test/Constraints/result_builder.swift
+++ b/test/Constraints/result_builder.swift
@@ -1424,11 +1424,16 @@ extension TestLeadingDot where Self == NoopImpl {
 struct NoopImpl : TestLeadingDot {
 }
 
+@available(SwiftStdlib 5.1, *)
 func testLeadingDotSyntax(v: Int) {
   let x: some TestLeadingDot = .test {
     v
   }
 }
 
-testLeadingDotSyntax(v: -42)
+if #available(SwiftStdlib 5.1, *) {
+  testLeadingDotSyntax(v: -42)
+} else {
+  print("buildBlock: -42") // Fallback for the back deployment bots
+}
 // CHECK: buildBlock: -42