https://git.ruby-lang.org/ruby.git/commit/?id=a58cbddd57

From a58cbddd57152a3a4712c6b37b6efa3c108847e7 Mon Sep 17 00:00:00 2001
From: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@s...>
Date: Tue, 27 Sep 2022 19:27:39 -0400
Subject: YJIT: add assertion wrt label names (#6459)

Add assertion wrt label names
---
 yjit/src/asm/mod.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/yjit/src/asm/mod.rs b/yjit/src/asm/mod.rs
index 22b46e6aca..f5501a4bc7 100644
--- a/yjit/src/asm/mod.rs
+++ b/yjit/src/asm/mod.rs
@@ -220,6 +220,8 @@ impl CodeBlock { https://github.com/ruby/ruby/blob/trunk/yjit/src/asm/mod.rs#L220
 
     /// Allocate a new label with a given name
     pub fn new_label(&mut self, name: String) -> usize {
+        assert!(!name.contains(" "), "use underscores in label names, not spaces");
+
         // This label doesn't have an address yet
         self.label_addrs.push(0);
         self.label_names.push(name);
-- 
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