Should not make empty strings shared; fix #3407

708088c5 · Yukihiro "Matz" Matsumoto · 49fd7590 · 708088c5
Commit 708088c5 authored 8 years ago by Yukihiro "Matz" Matsumoto
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src/string.c src/string.c +1 -1

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--- a/src/string.c
+++ b/src/string.c
@@ -423,7 +423,7 @@ byte_subseq(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
  mrb_shared_string *shared;

  orig = mrb_str_ptr(str);
-  if (RSTR_EMBED_P(orig)) {
+  if (RSTR_EMBED_P(orig) || RSTR_LEN(orig) == 0) {
    s = str_new(mrb, orig->as.ary+beg, len);
  }
  else {