[MC-130887] Crash with cartographers: Loading entity NBT

When summoniing a cartographer with this command:

 /summon villager ~ ~ ~ {Profession:1,Career:2,CareerLevel:3}

It will crash you when you try to open the villager, as well as some cartographers found naturally won't upgrade to a woodland mansion or sea temple map at all.

[08:38:36] [Server thread/WARN]: Exception loading entity: 
h: Loading entity NBT
	at aie.f(SourceFile:1593) ~[1.13-pre1.jar:?]
	at aii.a(SourceFile:367) ~[1.13-pre1.jar:?]
	at bqx.a(SourceFile:775) [1.13-pre1.jar:?]
	at bqx.a(SourceFile:723) [1.13-pre1.jar:?]
	at bqx.a(SourceFile:753) [1.13-pre1.jar:?]
	at rf.a(SourceFile:64) [1.13-pre1.jar:?]
	at rf.a(SourceFile:45) [1.13-pre1.jar:?]
	at rf$$Lambda$1365/1200592701.run(Unknown Source) [1.13-pre1.jar:?]
	at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:128) [brigadier-0.1.27.jar:?]
	at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:68) [brigadier-0.1.27.jar:?]
	at bu.a(SourceFile:202) [1.13-pre1.jar:?]
	at tl.c(SourceFile:830) [1.13-pre1.jar:?]
	at tl.a(SourceFile:817) [1.13-pre1.jar:?]
	at mc.a(SourceFile:37) [1.13-pre1.jar:?]
	at mc.a(SourceFile:9) [1.13-pre1.jar:?]
	at iu$1.run(SourceFile:13) [1.13-pre1.jar:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_25]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_25]
	at k.a(SourceFile:148) [1.13-pre1.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:670) [1.13-pre1.jar:?]
	at net.minecraft.server.MinecraftServer.v(SourceFile:626) [1.13-pre1.jar:?]
	at dio.v(SourceFile:156) [1.13-pre1.jar:?]
	at net.minecraft.server.MinecraftServer.run(SourceFile:531) [1.13-pre1.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
Caused by: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
	at com.google.gson.internal.Streams.parse(Streams.java:60) ~[gson-2.8.0.jar:?]
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:65) ~[gson-2.8.0.jar:?]
	at wt.a(SourceFile:493) ~[1.13-pre1.jar:?]
	at wt.a(SourceFile:518) ~[1.13-pre1.jar:?]
	at ig$a.a(SourceFile:243) ~[1.13-pre1.jar:?]
	at aie.f(SourceFile:1568) ~[1.13-pre1.jar:?]
	... 23 more
Caused by: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
	at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1559) ~[gson-2.8.0.jar:?]
	at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1401) ~[gson-2.8.0.jar:?]
	at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:593) ~[gson-2.8.0.jar:?]
	at com.google.gson.stream.JsonReader.peek(JsonReader.java:425) ~[gson-2.8.0.jar:?]
	at com.google.gson.internal.Streams.parse(Streams.java:46) ~[gson-2.8.0.jar:?]
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:65) ~[gson-2.8.0.jar:?]
	at wt.a(SourceFile:493) ~[1.13-pre1.jar:?]
	at wt.a(SourceFile:518) ~[1.13-pre1.jar:?]
	at ig$a.a(SourceFile:243) ~[1.13-pre1.jar:?]
	at aie.f(SourceFile:1568) ~[1.13-pre1.jar:?]
	... 23 more
[08:38:36] [Client thread/INFO]: [CHAT] Unable to summon entity