| refs0 = [], validrefs(str, r ' + refs0, st[r -- _type] .type, st) ⊦ (r ' + refs0) .last = jvmref, is_valid_ref((r ' + refs0) .last, st) |
validrefs(str, r ', st[r -- _type] .type, st) ⊦ r = jvmref, is_valid_ref(r, st)
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r ' .last = r], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ refs + [] = refs])]]