merge revision(s) fad48fefe19cc282a5b209944244a3713359b47f: [Backport #19399]

	[Bug #19399] Parsing invalid heredoc inside block parameter

	Although this is of course invalid as Ruby code, allow to just parse
	and tokenize.
	---
	 ext/ripper/lib/ripper/lexer.rb |  2 +-
	 test/ripper/test_lexer.rb      | 12 ++++++++++++
	 2 files changed, 13 insertions(+), 1 deletion(-)

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ripper/test_lexer.rb b/test/ripper/test_lexer.rb
index 27e0007023..8e8a616627 100644
--- a/test/ripper/test_lexer.rb
+++ b/test/ripper/test_lexer.rb
@@ -252,4 +252,16 @@ world"
 ]
     assert_equal(code, Ripper.tokenize(code).join(""), bug)
   end
+
+  def test_heredoc_inside_block_param
+    bug = '[Bug #19399]'
+    code = <<~CODE
+      a do |b
+        <<-C
+        C
+        |
+      end
+    CODE
+    assert_equal(code, Ripper.tokenize(code).join(""), bug)
+  end
 end