* string.c (rb_str_split_m): RSTRING(str)->ptr might become NULL.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2993 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 1 deletions

diff --git a/string.c b/string.c
index 57e0cad81a..3f1445fb5e 100644
--- a/string.c
+++ b/string.c
@@ -2533,7 +2533,11 @@ rb_str_split_m(argc, argv, str)
 	while ((end = rb_reg_search(spat, str, start, 0)) >= 0) {
 	    regs = RMATCH(rb_backref_get())->regs;
 	    if (start == end && BEG(0) == END(0)) {
-		if (last_null == 1) {
+		if (!RSTRING(str)->ptr) {
+		    rb_ary_push(result, rb_str_new("", 0));
+		    break;
+                }
+		else if (last_null == 1) {
 		    rb_ary_push(result, rb_str_substr(str, beg, mbclen2(RSTRING(str)->ptr[beg],spat)));
 		    beg = start;
 		}