Probably a bug in PlutusMap serialization

[klntsky]

I'm trying to create a map with duplicate keys, which should be allowed:

m = csl.PlutusMap.new()
vs = csl.PlutusMapValues.new()
zero = csl.PlutusData.new_integer(csl.BigInt.from_str('0'))
one = csl.PlutusData.new_integer(csl.BigInt.from_str('1'))
vs.add(zero)
vs.add(one)
m.insert(zero, vs)
r = csl.PlutusData.new_map(m)
r.to_hex()
'a103010302'

Which gives me the following parse using cbor.me:

A1    # map(1)
   03 # unsigned(3)
   01 # unsigned(1)


##### 2 unused bytes after the end of the data item:

03 02

Seemingly, the map size is wrong. The unused bytes fall outside the map

[lisicky]

Thanks @klntsky ! Fixed in 12.0.0