| st ⊆ st1, st[r -- _type] .type ≤ ty ⊦ r = jvmref, r = jvmref ∨ st1[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st1), junkref(str, r, st) |
st[r -- _type] .type ≤ ty, st ⊆ st1 ⊦ r = jvmref, junkref(str, r, st), st1[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st1)
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