LL | vecvec[0] += {
| ------
| |
- | _____borrow of `vecvec` occurs here
+ | _____`vecvec` is borrowed here
| |
LL | | vecvec = vec![];
- | | ^^^^^^ assignment to borrowed `vecvec` occurs here
+ | | ^^^^^^ `vecvec` is assigned to here but it was already borrowed
LL | |
LL | | 0
LL | | };