From 81376e72057026464e1c17330666d4fb3c5a7ce0 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Tue, 28 Feb 2023 21:57:59 -0700
Subject: [PATCH] fix UAF in build runner

---
 lib/build_runner.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/build_runner.zig b/lib/build_runner.zig
index d70dbf2919..9a8f138979 100644
--- a/lib/build_runner.zig
+++ b/lib/build_runner.zig
@@ -309,7 +309,7 @@ fn runStepNames(
         }
     }
 
-    const starting_steps = step_stack.items;
+    const starting_steps = try b.allocator.dupe(*Step, step_stack.items);
     for (starting_steps) |s| {
         checkForDependencyLoop(b, s, &step_stack) catch |err| switch (err) {
             error.DependencyLoopDetected => return error.UncleanExit,