string.c: fix rb_external_str_new_with_enc

* string.c (rb_external_str_new_with_enc): do not search non-ascii
  by NULL pointer.  [ruby-core:84055] [Bug #14150]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 21 insertions, 0 deletions

diff --git a/ext/-test-/string/new.c b/ext/-test-/string/new.c
new file mode 100644
index 0000000000..8a3613e374
--- /dev/null
+++ b/ext/-test-/string/new.c
@@ -0,0 +1,21 @@
+#include "ruby.h"
+#include "ruby/encoding.h"
+
+VALUE
+bug_str_buf_new(VALUE self, VALUE len)
+{
+    return rb_str_buf_new(NUM2LONG(len));
+}
+
+VALUE
+bug_external_str_new(VALUE self, VALUE len, VALUE enc)
+{
+    return rb_external_str_new_with_enc(NULL, NUM2LONG(len), rb_to_encoding(enc));
+}
+
+void
+Init_new(VALUE klass)
+{
+    rb_define_singleton_method(klass, "buf_new", bug_str_buf_new, 1);
+    rb_define_singleton_method(klass, "external_new", bug_external_str_new, 2);
+}