[MC-87281] Kicked from server when using /blockdata and /give for coloured signs

This happened when I put this command in a command block and placed the given sign:

/give @p sign 1 0 {BlockEntityTag:{Text1:" ",Text2:"{text:\"Players Remaining\",bold:\"true\",underlined:\"true\",color:dark_blue}",Text3:"{score:{name:\"Players:\",objective:\"Remain\"},bold:\"true\",color:yellow}",Text4:" "},display:{Name:"Custom Sign"}}

And the blockdata one is here:

/blockdata ~ ~ ~ {Text1:" ",Text2:"{text:\"Players Remaining\",bold:\"true\",underlined:\"true\",color:dark_blue}",Text3:"{score:{name:\"Players:\",objective:\"Remain\"},bold:\"true\",color:yellow}",Text4:" "}

The game immediately crashes and gives everyone on the server the error attached as a screenshot below.

Linked issues

duplicates

MC-87143 Setblock signs with text put "null" on empty lines by reloading the world

is duplicated by

MC-88046 Crash when placing Sign with NBT Data using /setblock

Attachments

Comments

Anon Ymus 2015-08-25T01:35:57Z

Confirmed. It is because your JSON is invalid, but that shouldn't kick all the clients.

Dominik Hauerstein 2015-08-25T09:28:40Z

That is strange because I used the same code for the signs on an 1.8 server. Has the syntax changed in 1.9 or is there something I'm doing wrong? And I agree, it shouldn't but it does, and we won't be able to join back until I restart the server.

Anon Ymus 2015-08-25T19:19:37Z

The syntax is the same, except the JSON must be valid JSON now, which mostly means that you must put quotes around the keys.

Dominik Hauerstein 2015-08-25T19:35:48Z

So technically, adding quotes in the correct places should definitely work?

Anon Ymus 2015-08-28T15:59:16Z

Yes. Of course they will have to be escaped since they are inside a string already.

marcono1234 2015-12-25T17:33:10Z

Relates to:

MC-87143

marcono1234 2015-12-25T20:54:58Z

It is actually caused by MC-87143.
Replacing the Strings for Text1 and Text4 with a proper JSON string fixes this. However since JSON parsing is strict now the keys need to be surrounded by quotes.

Replaced Text1 and Text4 (no kick)

/give @p sign 1 0 {BlockEntityTag:{Text1:"{\"text\":\" \"}",Text2:"{text:\"Players Remaining\",bold:\"true\",underlined:\"true\",color:dark_blue}",Text3:"{score:{name:\"Players:\",objective:\"Remain\"},bold:\"true\",color:yellow}",Text4:"{\"text\":\" \"}"},display:{Name:"Custom Sign"}}

Strict JSON (correct sign text)

/give @p sign 1 0 {BlockEntityTag:{Text1:"{\"text\":\" \"}",Text2:"{\"text\":\"Players Remaining\",\"bold\":true,\"underlined\":true,\"color\":\"dark_blue\"}",Text3:"{\"score\":{\"name\":\"Players:\",\"objective\":\"Remain\"},\"bold\":true,\"color\":\"yellow\"}",Text4:"{\"text\":\" \"}"},display:{Name:"Custom Sign"}}