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-rw-r--r--parse.y1
1 files changed, 1 insertions, 0 deletions
diff --git a/parse.y b/parse.y
index 80fef61f346..646e0ceeff3 100644
--- a/parse.y
+++ b/parse.y
@@ -7782,6 +7782,7 @@ list_concat_gen(struct parser_params *parser, NODE *head, NODE *tail)
static int
literal_concat0(struct parser_params *parser, VALUE head, VALUE tail)
{
+ if (NIL_P(tail)) return 1;
if (!rb_enc_compatible(head, tail)) {
compile_error(PARSER_ARG "string literal encodings differ (%s / %s)",
rb_enc_name(rb_enc_get(head)),