container.diff

diff --git a/src/binder/container.c b/src/binder/container.c
index d0d047e..6ae05c3 100644
--- a/src/binder/container.c
+++ b/src/binder/container.c
@@ -64,6 +64,10 @@ void Rakudo_cont_store(PARROT_INTERP, PMC *cont, PMC *value,
         Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
             "Cannot assign a non-Perl 6 value to a Perl 6 container");
     
+    if (PMC_IS_NULL(cont)) {
+        Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
+            "Cannot assign into a PMCNULL container");
+    }
     /* If it's a scalar container, optimized path. */
     if (STABLE(cont)->WHAT == scalar_type) {
         Rakudo_Scalar *scalar = (Rakudo_Scalar *)PMC_data(cont);