VECTOR_BLOCK_SIZE 2885 src/alloc.c    verify (VECTOR_BLOCK_SIZE % roundup_size == 0);
VECTOR_BLOCK_SIZE 2886 src/alloc.c    verify (VECTOR_BLOCK_SIZE <= (1 << PSEUDOVECTOR_SIZE_BITS));
VECTOR_BLOCK_SIZE 2895 src/alloc.c    enum {VECTOR_BLOCK_BYTES = VECTOR_BLOCK_SIZE - vroundup_ct (sizeof (void *))};