Do not make an incomplete escape a valid char

2 files changed, 5 insertions, 5 deletions

diff --git a/parse.y b/parse.y
index 24fa3d36ff..580b3c72da 100644
--- a/parse.y
+++ b/parse.y
@@ -6211,7 +6211,7 @@ tokadd_utf8(struct parser_params *p, rb_encoding **encp,
 
 	if (c != close_brace) {
 	  unterminated:
-	    literal_flush(p, p->lex.pcur);
+	    token_flush(p);
 	    yyerror0("unterminated Unicode escape");
 	    return;
 	}
@@ -6221,11 +6221,10 @@ tokadd_utf8(struct parser_params *p, rb_encoding **encp,
     }
     else {			/* handle \uxxxx form */
 	if (!tokadd_codepoint(p, encp, regexp_literal, FALSE)) {
+	    token_flush(p);
 	    return;
 	}
     }
-
-    return;
 }
 
 #define ESCAPE_CONTROL 1
@@ -6312,7 +6311,7 @@ read_escape(struct parser_params *p, int flags, rb_encoding **encp)
       eof:
       case -1:
         yyerror0("Invalid escape character syntax");
-	pushback(p, c);
+	token_flush(p);
 	return '\0';
 
       default:
@@ -6391,6 +6390,7 @@ tokadd_escape(struct parser_params *p, rb_encoding **encp)
       eof:
       case -1:
         yyerror0("Invalid escape character syntax");
+	token_flush(p);
 	return -1;
 
       default:
diff --git a/test/ripper/test_scanner_events.rb b/test/ripper/test_scanner_events.rb
index b46fcb5a9d..727e967d67 100644
--- a/test/ripper/test_scanner_events.rb
+++ b/test/ripper/test_scanner_events.rb
@@ -938,7 +938,7 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
 
     assert_equal ["?\\M-H"], scan('CHAR', '?\\M-H')
     err = nil
-    assert_equal ["?\\M"], scan('CHAR', '?\\M ') {|*e| err = e}
+    assert_equal [], scan('CHAR', '?\\M ') {|*e| err = e}
     assert_equal([:on_parse_error, "Invalid escape character syntax", "?\\M "], err)
   end