YJIT: add assertion wrt label names (#6459)

Add assertion wrt label names

1 files changed, 2 insertions, 0 deletions

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 {
 
     /// 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);