From e1c84e8ee6a3a7d50ba726c18ea99395aa0bf4ce Mon Sep 17 00:00:00 2001
From: Noah Gibbs <noah.gibbs@shopify.com>
Date: Tue, 9 May 2023 20:40:26 +0100
Subject: For YJIT stats, set avg_len_in_yjit to 0 if denominator would be 0
 (#7793)

---
 yjit.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'yjit.rb')

diff --git a/yjit.rb b/yjit.rb
index 2762788d84..666f8c7dd1 100644
--- a/yjit.rb
+++ b/yjit.rb
@@ -165,7 +165,7 @@ module RubyVM::YJIT
     retired_in_yjit = stats[:exec_instruction] - side_exits
 
     # Average length of instruction sequences executed by YJIT
-    avg_len_in_yjit = retired_in_yjit.to_f / total_exits
+    avg_len_in_yjit = total_exits > 0 ? retired_in_yjit.to_f / total_exits : 0
 
     # This only available on yjit stats builds
     if stats.key?(:vm_insns_count)
-- 
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