From be08e1b14c25979f8727edde70b37fc48b808cac Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@hawthorn.email>
Date: Wed, 12 Apr 2023 16:32:07 -0700
Subject: [PATCH] RJIT: argc check in known cfuncs

---
 lib/ruby_vm/rjit/insn_compiler.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ruby_vm/rjit/insn_compiler.rb b/lib/ruby_vm/rjit/insn_compiler.rb
index 906743ae0f..1788b20c3a 100644
--- a/lib/ruby_vm/rjit/insn_compiler.rb
+++ b/lib/ruby_vm/rjit/insn_compiler.rb
@@ -4937,7 +4937,7 @@ module RubyVM::RJIT
       end
 
       # Delegate to codegen for C methods if we have it.
-      if kw_arg.nil? && flags & C::VM_CALL_OPT_SEND == 0
+      if kw_arg.nil? && flags & C::VM_CALL_OPT_SEND == 0 && flags & C::VM_CALL_ARGS_SPLAT == 0 && (cfunc_argc == -1 || argc == cfunc_argc)
         known_cfunc_codegen = lookup_cfunc_codegen(cme.def)
         if known_cfunc_codegen&.call(jit, ctx, asm, argc, known_recv_class)
           # cfunc codegen generated code. Terminate the block so