From 3e4e10ffb6576aacf66b6648242e0454ca85c2fd Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 6 Jan 2020 22:27:39 +0900
Subject: `"0x10".to_f` should be `0`, not `16.0`; fix #4924

---
 src/string.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/string.c b/src/string.c
index 01f7d9efa..bf11ed668 100644
--- a/src/string.c
+++ b/src/string.c
@@ -2505,6 +2505,7 @@ mrb_str_len_to_dbl(mrb_state *mrb, const char *s, size_t len, mrb_bool badcheck)
   if (pend - p > 2 && p[0] == '0' && (p[1] == 'x' || p[1] == 'X')) {
     mrb_value x;
 
+    if (!badcheck) return 0.0;
     x = mrb_str_len_to_inum(mrb, p, pend-p, 0, badcheck);
     if (mrb_fixnum_p(x))
       d = (double)mrb_fixnum(x);
-- 
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