Cannot decode a CBOR string

This string:

`¢H90hÍÚ
&`

equivalent to

`a2 04 48 39 30 17 68 cd da 05 13 01 26`

Should decode to

```
A2 # map(2)
04 # unsigned(4)
48 # bytes(8)
39301768CDDA0513 # string
01 # unsigned(1)
26 # negative(6)
```

according to http://cbor.me/ , but it decodes to {}, i.e. nothing.

Start by reproducing the supplied hexadecimal CBOR input in CyberChef and compare its result with the expected two-entry map. The issue names no file or test, so trace the CBOR decoding operation from its user-facing entry point; done means this input produces the documented map instead of {}.

Written by the indexing model from the issue text.