tc: exp-time whilst running analysis on this chunk

The following snippet (with the addition of more `+ 1`) causes the compiler to exhibit exponential compile times (specifically in the analysis phase).

```rust
main := () => {
y := 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 +
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1;
} // 170ms
```

The above snippet took `170ms` to evaluate, and the one below took `310ms`, and the one after `600ms`:

```rust
main := () => {
y := 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 +
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 +
1;
} // 310ms
```

```rust
main := () => {
y := 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 +
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 +
1 + 1;
} // 600ms
```