Solang crashes when Yul functions are nested multiple levels deep.

[lum7na]

Compile: solang compile a.sol --target solana

contract Test {
  function test1(uint256 _value) private returns(uint256 result) {
    assembly  {
      {
        function f1()
        {
          {
            function f2()
            {
              function f3()
              {
                leave
                function f4()
                {
                  
                }
              }
              leave
            }
          }
          if 0x80000 { leave }
          leave
          f1()
        }
      }
    }
  }

  function test2(uint256 layout) public returns(uint8) {
    assembly  {
      {
        function f() -> v
        { }
        switch f()
        case 1 { }
        case 2 { }
        default { }
      }
    }
    return 0;
  }

}

Output:

thread 'main' panicked at src/codegen/solana_accounts/account_collection.rs:224:29:
index out of bounds: the len is 4 but the index is 4
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace