GHSA-3P37-3636-Q8WV Vyper vulnerable to OOB DynArray access when array is on both LHS and RHS of an assignment

Impact during codegen, the length word of a dynarray is written before the data, which can result in OOB array access in the case where the dynarray is on both the lhs and rhs of an assignment. here is a minimal example producing the issue: vyper a:DynArrayuint256,3 @external def test -...