[PRISM] Implement CallNodes with splat followed by args

prism_compile.c

@@ -1022,8 +1022,16 @@ pm_setup_args(pm_arguments_node_t *arguments_node, int *flags, struct rb_callinf
                       }
                       // If it's the final node
                       else if (index == arguments_node_list.size - 1) {
-                          ADD_INSN1(ret, &dummy_line_node, newarray, INT2FIX(post_splat_counter));
-                          ADD_INSN(ret, &dummy_line_node, concatarray);
+                          if (post_splat_counter > 1) {
+                              ADD_INSN1(ret, &dummy_line_node, newarray, INT2FIX(post_splat_counter));
+                              ADD_INSN1(ret, &dummy_line_node, splatarray, Qfalse);
+                              ADD_INSN(ret, &dummy_line_node, concatarray);
+                          }
+                          else {
+                              ADD_INSN1(ret, &dummy_line_node, newarray, INT2FIX(post_splat_counter));
+                              ADD_INSN(ret, &dummy_line_node, concatarray);
+                          }
+                          orig_argc = 1;
                       }
                   }
               }

test/ruby/test_compile_prism.rb

@@ -935,12 +935,19 @@ module Prism
 
       # With different types of calling arguments
       assert_prism_eval(<<-CODE)
-        def self.prism_test_call_node(**); end
-        prism_test_call_node(b: 1, **{})
+        def self.prism_test_call_node_double_splat(**); end
+        prism_test_call_node_double_splat(b: 1, **{})
       CODE
       assert_prism_eval(<<-CODE)
-        prism_test_call_node(:b => 1)
+        prism_test_call_node_double_splat(:b => 1)
       CODE
+
+      assert_prism_eval(<<-CODE)
+        def self.prism_test_call_node_splat(*); end
+        prism_test_call_node_splat(*[], 1)
+      CODE
+
+      assert_prism_eval("prism_test_call_node_splat(*[], 1, 2)")
     end
 
     def test_CallAndWriteNode