From 6e519ea6b7e157ef1da89e39b660fe2aab8f6dcf Mon Sep 17 00:00:00 2001
From: Jack O'Connor <oconnor663@gmail.com>
Date: Sun, 21 Jan 2024 17:54:09 -0800
Subject: [PATCH] configure no_std for guts, but not for testing

---
 rust/guts/src/lib.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rust/guts/src/lib.rs b/rust/guts/src/lib.rs
index 67f7a05c0..3760fa8f2 100644
--- a/rust/guts/src/lib.rs
+++ b/rust/guts/src/lib.rs
@@ -1,3 +1,6 @@
+// Tests always require libstd.
+#![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
+
 use core::cmp;
 use core::marker::PhantomData;
 use core::mem;