merge revision(s) 9f91f36: [Backport #21383]

	Fix memory leak with invalid yield in prism

	[Bug #21383]

	The following script leaks memory:

	    10.times do
	      20_000.times do
	        eval("class C; yield; end")
	      rescue SyntaxError
	      end

	      puts `ps -o rss= -p #{$$}`
	    end

	Before:

	    16464
	    25536
	    29424
	    35904
	    39552
	    44576
	    46736
	    51600
	    56096
	    59824

	After:

	    13488
	    16160
	    18240
	    20528
	    19760
	    21808
	    21680
	    22272
	    22064
	    22336

Author: k0kubun

prism_compile.c

@@ -1265,6 +1265,7 @@ pm_new_child_iseq(rb_iseq_t *iseq, pm_scope_node_t *node, VALUE name, const rb_i
             type, ISEQ_COMPILE_DATA(iseq)->option, &error_state);
 
     if (error_state) {
+        pm_scope_node_destroy(node);
         RUBY_ASSERT(ret_iseq == NULL);
         rb_jump_tag(error_state);
     }

test/ruby/test_ast.rb

@@ -337,6 +337,19 @@ def test_invalid_yield
     assert_parse("END {defined? yield}")
   end
 
+  def test_invalid_yield_no_memory_leak
+    # [Bug #21383]
+    assert_no_memory_leak([], "#{<<-"begin;"}", "#{<<-'end;'}", rss: true)
+      code = proc do
+        eval("class C; yield; end")
+      rescue SyntaxError
+      end
+      1_000.times(&code)
+    begin;
+      100_000.times(&code)
+    end;
+  end
+
   def test_node_id_for_location
     omit if ParserSupport.prism_enabled?
 

version.h

@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 4
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 36
+#define RUBY_PATCHLEVEL 37
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"