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Jim Mussared authored
This fixes the case where e.g. struct foo_t { mp_obj_t x; uint16_t y; char buf[]; }; will have `sizeof(struct foo_t)==8`, but `offsetof(struct foo_t, buf)==6`. When computing the size to allocate for `m_new_obj_var` we need to use offsetof to avoid over-allocating. This is important especially when it might cause it to spill over into another GC block. This work was funded through GitHub Sponsors. Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
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