* string.c (rb_str_set_len): should fail to modify shared string.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28865 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 19 insertions, 0 deletions

diff --git a/ext/-test-/string/init.c b/ext/-test-/string/init.c
new file mode 100644
index 0000000000..793181d148
--- /dev/null
+++ b/ext/-test-/string/init.c
@@ -0,0 +1,19 @@
+#include "ruby.h"
+
+#define init(n) {void Init_##n(VALUE klass); Init_##n(klass);}
+
+VALUE
+bug_str_modify(VALUE str)
+{
+    rb_str_modify(str);
+    return str;
+}
+
+void
+Init_string(void)
+{
+    VALUE mBug = rb_define_module("Bug");
+    VALUE klass = rb_define_class_under(mBug, "String", rb_cString);
+    rb_define_method(klass, "modify!", bug_str_modify, 0);
+    TEST_INIT_FUNCS(init);
+}