Fix Ruby head build

Author: kddnewton

lib/syntax_tree/yarv/compiler.rb

@@ -663,32 +663,10 @@ def visit_call(node)
           when ArgsForward
             flag |= CallData::CALL_TAILCALL if options.tailcall_optimization?
 
-            if RUBY_VERSION < "3.2"
-              flag |= CallData::CALL_ARGS_SPLAT
-              lookup = iseq.local_table.find(:*)
-              iseq.getlocal(lookup.index, lookup.level)
-              iseq.splatarray(arg_parts.length != 1)
-            else
-              flag |= CallData::CALL_ARGS_SPLAT
-              lookup = iseq.local_table.find(:*)
-              iseq.getlocal(lookup.index, lookup.level)
-              iseq.splatarray(true)
-
-              flag |= CallData::CALL_KW_SPLAT
-              iseq.putspecialobject(PutSpecialObject::OBJECT_VMCORE)
-              iseq.newhash(0)
-              lookup = iseq.local_table.find(:**)
-              iseq.getlocal(lookup.index, lookup.level)
-              iseq.send(
-                YARV.calldata(
-                  :"core#hash_merge_kwd",
-                  2,
-                  CallData::CALL_ARGS_SIMPLE
-                )
-              )
-              iseq.newarray(1)
-              iseq.concatarray
-            end
+            flag |= CallData::CALL_ARGS_SPLAT
+            lookup = iseq.local_table.find(:*)
+            iseq.getlocal(lookup.index, lookup.level)
+            iseq.splatarray(arg_parts.length != 1)
 
             flag |= CallData::CALL_ARGS_BLOCKARG
             lookup = iseq.local_table.find(:&)
@@ -1339,14 +1317,13 @@ def visit_params(node)
         if node.keyword_rest.is_a?(ArgsForward)
           if RUBY_VERSION >= "3.2"
             iseq.local_table.plain(:*)
-            iseq.local_table.plain(:**)
             iseq.local_table.plain(:&)
+            iseq.local_table.plain(:"...")
 
             iseq.argument_options[:rest_start] = iseq.argument_size
-            iseq.argument_options[:block_start] = iseq.argument_size + 2
-            iseq.argument_options[:kwrest] = iseq.argument_size + 1
+            iseq.argument_options[:block_start] = iseq.argument_size + 1
 
-            iseq.argument_size += 3
+            iseq.argument_size += 2
           else
             iseq.local_table.plain(:*)
             iseq.local_table.plain(:&)