merge revision(s) 53e9908d8afc7f03109b0aafd1698ab35f512b05: [Backport #15916]

	Fix memory leak

	* string.c (str_replace_shared_without_enc): free previous buffer
	  before replaced.

	* parse.y (gettable): make sure in advance that the `__FILE__`
	  object shares a fstring, to get rid of replacement with the
	  fstring later.
	  TODO: this hack may be needed in other places.

	[Bug #15916]

	Co-Authored-By: luke-gru (Luke Gruber) <luke.gru@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/parse.y b/parse.y
index 42f1a8f021..473ae0e216 100644
--- a/parse.y
+++ b/parse.y
@@ -8760,7 +8760,7 @@ gettable(struct parser_params *p, ID id, const YYLTYPE *loc)
 	    if (NIL_P(file))
 		file = rb_str_new(0, 0);
 	    else
-		file = rb_str_dup(file);
+		file = rb_str_dup(rb_fstring(file));
 	    node = NEW_STR(add_mark_object(p, file), loc);
 	}
 	return node;