Crash when decoding some emojis

[Alberdi]

I'm trying to decode ❤‍🔥 (heart on fire) but njson crashes:

1> Bin = <<"{\"text\":{\"body\":\"\\u2764\\u200d\\ud83d\\udd25\"}}">>.
<<"{\"text\":{\"body\":\"\\u2764\\u200d\\ud83d\\udd25\"}}">>

2> json:decode(Bin).
[{text,[{body,<<226,157,164,226,128,141,240,159,148,165>>}]}]

3> njson:decode(Bin).
** exception error: construction of binary failed
     in function  njson_decoder:string_len/3 (/opt/chat_core/_build/default/lib/njson/src/njson_decoder.erl, line 165)
        *** segment 1 of type 'utf8': expected a non-negative integer encodable as utf8 but got: 55357
     in call from njson_decoder:string/2 (/opt/chat_core/_build/default/lib/njson/src/njson_decoder.erl, line 137)
     in call from njson:decode/1 (/opt/chat_core/_build/default/lib/njson/src/njson.erl, line 34)

The encoding of the emoji I've used above is exactly as it comes from WhatsApp.

[javiergarea]

closed by #5