merge revision(s) 58545,58584: [Backport #13536]

	ripper/lexer.rb: nested indented heredoc

	* ext/ripper/lib/ripper/lexer.rb (on_heredoc_dedent): fix for
	  nested indedented here documents, where `Elem`s are nested too.
	  [ruby-core:80977] [Bug #13536]
	ripper/lexer.rb: nested indented heredoc

	* ext/ripper/lib/ripper/lexer.rb (on_heredoc_dedent): insert
	  stripped leading spaces as `on_ignored_sp` elements, so that the
	  original source can be reconsructed.
	  [ruby-core:80977] [Bug #13536]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@59247 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

4 files changed, 49 insertions, 6 deletions

diff --git a/ext/ripper/lib/ripper/lexer.rb b/ext/ripper/lib/ripper/lexer.rb
index 69526340a7..e70db0b1d1 100644
--- a/ext/ripper/lib/ripper/lexer.rb
+++ b/ext/ripper/lib/ripper/lexer.rb
@@ -66,13 +66,20 @@ class Ripper
     private
 
     def on_heredoc_dedent(v, w)
-      @buf.last.each do |e|
-        if e.event == :on_tstring_content
+      ignored_sp = []
+      heredoc = @buf.last
+      heredoc.each_with_index do |e, i|
+        if Elem === e and e.event == :on_tstring_content
+          tok = e.tok.dup if w > 0 and /\A\s/ =~ e.tok
           if (n = dedent_string(e.tok, w)) > 0
+            ignored_sp << [i, Elem.new(e.pos.dup, :on_ignored_sp, tok[0, n])]
             e.pos[1] += n
           end
         end
       end
+      ignored_sp.reverse_each do |i, e|
+        heredoc[i, 0] = [e]
+      end
       v
     end
 
diff --git a/test/ripper/test_lexer.rb b/test/ripper/test_lexer.rb
new file mode 100644
index 0000000000..72b7f1b5fd
--- /dev/null
+++ b/test/ripper/test_lexer.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+begin
+  require_relative 'dummyparser'
+  require 'test/unit'
+  ripper_test = true
+  module TestRipper; end
+rescue LoadError
+end
+
+class TestRipper::Lexer < Test::Unit::TestCase
+  def test_nested_dedent_heredoc
+    bug = '[ruby-core:80977] [Bug #13536]'
+    str = <<~'E'
+    <<~"D"
+    #{
+    <<~"B"
+    this must be a valid ruby
+    B
+    }
+    D
+    E
+    assert_equal(str, Ripper.tokenize(str).join(""), bug)
+
+    str = <<~'E'
+    <<~"D"
+    #{
+    <<~"B"
+      this must be a valid ruby
+    B
+    }
+    D
+    E
+    assert_equal(str, Ripper.tokenize(str).join(""), bug)
+  end
+end
diff --git a/test/ripper/test_scanner_events.rb b/test/ripper/test_scanner_events.rb
index 1b7b56ebfe..893e212ee7 100644
--- a/test/ripper/test_scanner_events.rb
+++ b/test/ripper/test_scanner_events.rb
@@ -105,6 +105,7 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
                  Ripper.lex("1r\n2i\n3ri\n4.2r\n5.6ri")
      assert_equal [[[1, 0], :on_heredoc_beg, "<<~EOS"],
                    [[1, 6], :on_nl, "\n"],
+                   [[2, 0], :on_ignored_sp, "  "],
                    [[2, 2], :on_tstring_content, "heredoc\n"],
                    [[3, 0], :on_heredoc_end, "EOS"]
                  ],
diff --git a/version.h b/version.h
index fd82bf4551..17482a5ede 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.4.2"
-#define RUBY_RELEASE_DATE "2017-05-10"
-#define RUBY_PATCHLEVEL 131
+#define RUBY_RELEASE_DATE "2017-07-01"
+#define RUBY_PATCHLEVEL 132
 
 #define RUBY_RELEASE_YEAR 2017
-#define RUBY_RELEASE_MONTH 5
-#define RUBY_RELEASE_DAY 10
+#define RUBY_RELEASE_MONTH 7
+#define RUBY_RELEASE_DAY 1
 
 #include "ruby/version.h"