A top level tuple triggers a panic

[hugocaillard]

A contract with the following code

{
  username: "ClarityIsAwesome",
  address: 'ST1HTBVD3JG9C05J7HBJTHGR0GGW7KXW28M5JS8QE
}

Trigger the following error in clarinet console

thread 'main' panicked at /Users/hugo/.cargo/git/checkouts/stacks-core-16deff9526aec9a7/5956df3/clarity/./src/vm/clarity_wasm.rs:1724:26:
index out of bounds: the len is 4 but the index is 22
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[Acaccia]

@ameeratgithub this is certainly related to #274.
This could help you create a minimal example of the bug.