| newref(r, st) ⊦ r = jvmref, junkrefs(str, r ', ty, st) |
⊦ junkrefs(str, r ', ty, st) ↔ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty)
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ newref(r, st) → ¬ is_valid_ref(str, r, st)])], [EXTRATERMS : (st, ty, r, str)]]