https://git.ruby-lang.org/ruby.git/commit/?id=aae25ddb51

From aae25ddb516af61165283fd5a60601f223c58184 Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 28 Aug 2019 05:41:10 +0000
Subject: merge revision(s) 4e038a7e64a9d52eed59b8f05647d4e58d265ec3: [Backport
 #5400]

	Revert "parse.y: Deprecate flip-flops"

	This reverts commit bae638ad5b782c44c80efe33834cb9039279af46.

	[Feature #5400]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67792 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

diff --git a/parse.y b/parse.y
index b81dbbc..0e919f1 100644
--- a/parse.y
+++ b/parse.y
@@ -9861,10 +9861,8 @@ cond0(struct parser_params *p, NODE *node, int method_op, const YYLTYPE *loc) https://github.com/ruby/ruby/blob/trunk/parse.y#L9861
       case NODE_DOT3:
 	node->nd_beg = range_op(p, node->nd_beg, loc);
 	node->nd_end = range_op(p, node->nd_end, loc);
-	if (nd_type(node) == NODE_DOT2 || nd_type(node) == NODE_DOT3) {
-	    nd_set_type(node, nd_type(node) == NODE_DOT2 ? NODE_FLIP2 : NODE_FLIP3);
-	    parser_warn(p, node, "flip-flop is deprecated");
-	}
+	if (nd_type(node) == NODE_DOT2) nd_set_type(node,NODE_FLIP2);
+	else if (nd_type(node) == NODE_DOT3) nd_set_type(node, NODE_FLIP3);
 	if (!method_op && !e_option_supplied(p)) {
 	    int b = literal_node(node->nd_beg);
 	    int e = literal_node(node->nd_end);
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 91db645..4e403a9 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -978,9 +978,7 @@ eom https://github.com/ruby/ruby/blob/trunk/test/ruby/test_syntax.rb#L978
       eval('1 if !//')
     end
     assert_warn('') do
-      verbose_bak, $VERBOSE = $VERBOSE, nil
       eval('1 if !(true..false)')
-      $VERBOSE = verbose_bak
     end
     assert_warning('') do
       eval('1 if !1')
diff --git a/version.h b/version.h
index 2b19dec..04d01e4 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L1
 #define RUBY_VERSION "2.6.4"
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 102
+#define RUBY_PATCHLEVEL 103
 
 #define RUBY_RELEASE_YEAR 2019
 #define RUBY_RELEASE_MONTH 8
-#define RUBY_RELEASE_DAY 27
+#define RUBY_RELEASE_DAY 28
 
 #include "ruby/version.h"
 
-- 
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