https://git.ruby-lang.org/ruby.git/commit/?id=9cdc964d07

From 9cdc964d075fc3d21b8ce8456ac88f57a5183ec0 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 4 Feb 2020 14:41:52 +0900
Subject: Do not warn CR inside string literal


diff --git a/parse.y b/parse.y
index c0d4639..11ef0f7 100644
--- a/parse.y
+++ b/parse.y
@@ -6260,11 +6260,6 @@ parser_cr(struct parser_params *p, int c) https://github.com/ruby/ruby/blob/trunk/parse.y#L6260
 	p->lex.pcur++;
 	c = '\n';
     }
-    else if (!p->cr_seen) {
-	p->cr_seen = TRUE;
-	/* carried over with p->lex.nextline for nextc() */
-	rb_warn0("encountered \\r in middle of line, treated as a mere space");
-    }
     return c;
 }
 
@@ -8833,7 +8828,14 @@ parser_yylex(struct parser_params *p) https://github.com/ruby/ruby/blob/trunk/parse.y#L8828
 	return 0;
 
 	/* white spaces */
-      case ' ': case '\t': case '\f': case '\r':
+      case '\r':
+	if (!p->cr_seen) {
+	    p->cr_seen = TRUE;
+	    /* carried over with p->lex.nextline for nextc() */
+	    rb_warn0("encountered \\r in middle of line, treated as a mere space");
+	}
+	/* fall through */
+      case ' ': case '\t': case '\f':
       case '\13': /* '\v' */
 	space_seen = 1;
 #ifdef RIPPER
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 5591b7c..f92966f 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -949,9 +949,14 @@ eom https://github.com/ruby/ruby/blob/trunk/test/ruby/test_syntax.rb#L949
 
   def test_warning_for_cr
     feature8699 = '[ruby-core:56240] [Feature #8699]'
-    assert_warning(/encountered \\r/, feature8699) do
-      eval("\r""__id__\r")
+    s = assert_warning(/encountered \\r/, feature8699) do
+      eval("'\r'\r")
     end
+    assert_equal("\r", s)
+    s = assert_warning('') do
+      eval("'\r'\r\n")
+    end
+    assert_equal("\r", s)
   end
 
   def test_unexpected_fraction
-- 
cgit v0.10.2


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