Check -1 arity for C++

1 files changed, 13 insertions, 0 deletions

diff --git a/ext/-test-/cxxanyargs/failurem1.cpp b/ext/-test-/cxxanyargs/failurem1.cpp
new file mode 100644
index 0000000000..e58a0f4e0d
--- /dev/null
+++ b/ext/-test-/cxxanyargs/failurem1.cpp
@@ -0,0 +1,13 @@
+#include <ruby/ruby.h>
+
+static VALUE
+func_argm1(int argc, VALUE *argv, VALUE self)
+{
+    return argc > 0 ? argv[0] : Qnil;
+}
+
+extern "C" void
+Init_failure(void)
+{
+    rb_define_method(rb_cObject, "argm1", func_argm1, 0);
+}