merge revision(s) 51820: [Backport #11519]

	* parse.y (literal_concat_gen, evstr2dstr_gen): keep literal
	  encoding beginning with an interpolation same as the source file
	  encoding.  [ruby-core:70703] [Bug #11519]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52773 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/parse.y b/parse.y
index 9df51a19b9..dfeadb0918 100644
--- a/parse.y
+++ b/parse.y
@@ -8744,7 +8744,7 @@ literal_concat_gen(struct parser_params *parser, NODE *head, NODE *tail)
 
     htype = nd_type(head);
     if (htype == NODE_EVSTR) {
-	NODE *node = NEW_DSTR(Qnil);
+	NODE *node = NEW_DSTR(STR_NEW0());
 	head = list_append(node, head);
 	htype = NODE_DSTR;
     }
@@ -8817,7 +8817,7 @@ static NODE *
 evstr2dstr_gen(struct parser_params *parser, NODE *node)
 {
     if (nd_type(node) == NODE_EVSTR) {
-	node = list_append(NEW_DSTR(Qnil), node);
+	node = list_append(NEW_DSTR(STR_NEW0()), node);
     }
     return node;
 }