Merge pull request #6252 from rudkx/requires-deterministic-behavior

diff --git a/validation-test/compiler_crashers/28578-result-case-not-implemented.swift b/validation-test/compiler_crashers/28578-result-case-not-implemented.swift
index 909b0ab..c889e9c 100644
--- a/validation-test/compiler_crashers/28578-result-case-not-implemented.swift
+++ b/validation-test/compiler_crashers/28578-result-case-not-implemented.swift
@@ -5,6 +5,7 @@
 // See https://swift.org/LICENSE.txt for license information
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
+// REQUIRES: deterministic-behavior
 // RUN: not --crash %target-swift-frontend %s -emit-ir
 // REQUIRES: asserts
 {c:{a{}guard{return $0+1