* upstream sync

Author: palkan

lib/parser/rubynext.y

@@ -2299,11 +2299,12 @@ opt_block_args_tail:
        p_var_ref: tCARET tIDENTIFIER
                     {
                       name = val[1][0]
+                      lvar = @builder.accessible(@builder.ident(val[1]))
+
                       unless static_env.declared?(name)
                         diagnostic :error, :undefined_lvar, { :name => name }, val[1]
                       end
 
-                      lvar = @builder.accessible(@builder.ident(val[1]))
                       result = @builder.pin(val[0], lvar)
                     }
 

test/test_parser.rb

@@ -6989,7 +6989,7 @@ def test_return_in_sclass_since_34
       %q{class << foo; return; end},
       %q{              ^^^^^^ location},
       SINCE_3_4)
-    
+
     assert_diagnoses(
       [:error, :invalid_return, {}],
       %q{class A; class << self; return; end; end},
@@ -9678,7 +9678,7 @@ def test_pattern_matching_numbered_parameter
       [:error, :reserved_for_numparam, { :name => '_1' }],
       %q{case 0; in _1; end},
       %q{           ^^ location},
-      SINCE_3_0)
+      SINCE_3_0 - %w(next))
 
     assert_diagnoses(
       [:error, :undefined_lvar, { :name => '_1' }],