[ruby/prism] Disallow forwarding in blocks

https://github.com/ruby/prism/commit/2bbd35943c

prism/prism.c

@@ -11029,7 +11029,7 @@ parse_parameters(
     pm_binding_power_t binding_power,
     bool uses_parentheses,
     bool allows_trailing_comma,
-    bool allows_forwarding_parameter
+    bool allows_forwarding_parameters
 ) {
     pm_parameters_node_t *params = pm_parameters_node_create(parser);
     bool looping = true;
@@ -11064,7 +11064,10 @@ parse_parameters(
                     pm_parser_local_add_token(parser, &name);
                 } else {
                     name = not_provided(parser);
-                    pm_parser_local_add_token(parser, &operator);
+
+                    if (allows_forwarding_parameters) {
+                        pm_parser_local_add_token(parser, &operator);
+                    }
                 }
 
                 pm_block_parameter_node_t *param = pm_block_parameter_node_create(parser, &name, &operator);
@@ -11078,7 +11081,7 @@ parse_parameters(
                 break;
             }
             case PM_TOKEN_UDOT_DOT_DOT: {
-                if (!allows_forwarding_parameter) {
+                if (!allows_forwarding_parameters) {
                     pm_parser_err_current(parser, PM_ERR_ARGUMENT_NO_FORWARDING_ELLIPSES);
                 }
 
@@ -11086,7 +11089,7 @@ parse_parameters(
                     update_parameter_state(parser, &parser->current, &order);
                     parser_lex(parser);
 
-                    if (allows_forwarding_parameter) {
+                    if (allows_forwarding_parameters) {
                         pm_parser_local_add_constant(parser, "*", 1);
                         pm_parser_local_add_constant(parser, "&", 1);
                         pm_parser_local_add_token(parser, &parser->previous);
@@ -11244,7 +11247,10 @@ parse_parameters(
                     pm_parser_local_add_token(parser, &name);
                 } else {
                     name = not_provided(parser);
-                    pm_parser_local_add_token(parser, &operator);
+
+                    if (allows_forwarding_parameters) {
+                        pm_parser_local_add_token(parser, &operator);
+                    }
                 }
 
                 pm_rest_parameter_node_t *param = pm_rest_parameter_node_create(parser, &operator, &name);
@@ -11276,7 +11282,10 @@ parse_parameters(
                         pm_parser_local_add_token(parser, &name);
                     } else {
                         name = not_provided(parser);
-                        pm_parser_local_add_token(parser, &operator);
+
+                        if (allows_forwarding_parameters) {
+                            pm_parser_local_add_token(parser, &operator);
+                        }
                     }
 
                     param = (pm_node_t *) pm_keyword_rest_parameter_node_create(parser, &operator, &name);

test/prism/snapshots/unparser/corpus/literal/block.txt

@@ -226,7 +226,7 @@
         │   ├── closing_loc: ∅
         │   ├── block:
         │   │   @ BlockNode (location: (17,4)-(19,1))
-        │   │   ├── locals: [:a, :*]
+        │   │   ├── locals: [:a]
         │   │   ├── parameters:
         │   │   │   @ BlockParametersNode (location: (17,6)-(17,12))
         │   │   │   ├── parameters:
@@ -488,7 +488,7 @@
         │   ├── closing_loc: ∅
         │   ├── block:
         │   │   @ BlockNode (location: (32,8)-(34,1))
-        │   │   ├── locals: [:*]
+        │   │   ├── locals: []
         │   │   ├── parameters:
         │   │   │   @ BlockParametersNode (location: (32,10)-(32,13))
         │   │   │   ├── parameters:

test/prism/snapshots/whitequark/blockargs.txt

@@ -119,7 +119,7 @@
         │   ├── closing_loc: ∅
         │   ├── block:
         │   │   @ BlockNode (location: (9,1)-(9,12))
-        │   │   ├── locals: [:*, :b]
+        │   │   ├── locals: [:b]
         │   │   ├── parameters:
         │   │   │   @ BlockParametersNode (location: (9,3)-(9,10))
         │   │   │   ├── parameters:
@@ -265,7 +265,7 @@
         │   ├── closing_loc: ∅
         │   ├── block:
         │   │   @ BlockNode (location: (17,1)-(17,8))
-        │   │   ├── locals: [:*]
+        │   │   ├── locals: []
         │   │   ├── parameters:
         │   │   │   @ BlockParametersNode (location: (17,3)-(17,6))
         │   │   │   ├── parameters:
@@ -379,7 +379,7 @@
         │   ├── closing_loc: ∅
         │   ├── block:
         │   │   @ BlockNode (location: (27,1)-(27,15))
-        │   │   ├── locals: [:a, :*, :b]
+        │   │   ├── locals: [:a, :b]
         │   │   ├── parameters:
         │   │   │   @ BlockParametersNode (location: (27,3)-(27,13))
         │   │   │   ├── parameters:
@@ -533,7 +533,7 @@
         │   ├── closing_loc: ∅
         │   ├── block:
         │   │   @ BlockNode (location: (35,1)-(35,11))
-        │   │   ├── locals: [:a, :*]
+        │   │   ├── locals: [:a]
         │   │   ├── parameters:
         │   │   │   @ BlockParametersNode (location: (35,3)-(35,9))
         │   │   │   ├── parameters:

test/prism/snapshots/whitequark/send_lambda.txt

@@ -4,7 +4,7 @@
     @ StatementsNode (location: (1,0)-(5,5))
     └── body: (length: 3)
         ├── @ LambdaNode (location: (1,0)-(1,8))
-        │   ├── locals: [:*]
+        │   ├── locals: []
         │   ├── operator_loc: (1,0)-(1,2) = "->"
         │   ├── opening_loc: (1,5)-(1,6) = "{"
         │   ├── closing_loc: (1,7)-(1,8) = "}"