[ruby/prism] Fix splat after kwsplat

ruby/prism@70c1cd480f

Author: haldun

prism/prism.c

@@ -14190,6 +14190,9 @@ parse_arguments(pm_parser_t *parser, pm_arguments_t *arguments, bool accepts_for
                 if (match4(parser, PM_TOKEN_PARENTHESIS_RIGHT, PM_TOKEN_COMMA, PM_TOKEN_SEMICOLON, PM_TOKEN_BRACKET_RIGHT)) {
                     pm_parser_scope_forwarding_positionals_check(parser, &operator);
                     argument = (pm_node_t *) pm_splat_node_create(parser, &operator, NULL);
+                    if (parsed_bare_hash) {
+                        pm_parser_err_previous(parser, PM_ERR_ARGUMENT_SPLAT_AFTER_ASSOC_SPLAT);
+                    }
                 } else {
                     pm_node_t *expression = parse_value_expression(parser, PM_BINDING_POWER_DEFINED, false, false, PM_ERR_EXPECT_EXPRESSION_AFTER_SPLAT, (uint16_t) (depth + 1));
 

test/prism/errors/arguments_splat_after_star_star.txt

@@ -0,0 +1,3 @@
+def f(*, **); p(**, *); end
+                    ^ unexpected `*` splat argument after a `**` keyword splat argument
+