1 files changed, 15 insertions, 0 deletions
diff --git a/ext/-test-/string/enc_dummy.c b/ext/-test-/string/enc_dummy.c
new file mode 100644
index 0000000000..4169552655
--- /dev/null
+++ b/ext/-test-/string/enc_dummy.c
@@ -0,0 +1,15 @@
+#include "ruby.h"
+#include "ruby/encoding.h"
+
+VALUE
+bug_rb_define_dummy_encoding(VALUE self, VALUE name)
+{
+    int idx = rb_define_dummy_encoding(RSTRING_PTR(name));
+    return rb_enc_from_encoding(rb_enc_from_index(idx));
+}
+
+void
+Init_string_enc_dummy(VALUE klass)
+{
+    rb_define_singleton_method(klass, "rb_define_dummy_encoding", bug_rb_define_dummy_encoding, 1);
+}