Commit graph

3 commits

Author SHA1 Message Date
Mariell Hoversholm
0f78e95250 More work 2021-03-18 18:03:22 +01:00
jmp
1718f61bf8 Updated Upstream (CraftBukkit/Spigot)
Doesn't compile yet.

CraftBukkit Changes:
90d6905b Repackage NMS
69cf961d Repackage patches

Spigot Changes:
79d53c28 Repackage NMS
2021-03-18 18:03:22 +01:00
Mariell Hoversholm
fcc6d33590 Throw proper exception on empty JsonList file
Related to #4174, #4717.

As it stands, `JsonList` throws an NPE on `jsonarray.iterator()` when
the reader given is at EOF. This means there is an unintelligible
message shown to the player:

```
[16:44:31 ERROR]: Encountered an unexpected exception
java.lang.NullPointerException: Cannot invoke "com.google.gson.JsonArray.iterator()" because "jsonarray" is null
	at net.minecraft.server.v1_16_R2.JsonList.load(JsonList.java:192) ~[patched_1.16.3.jar:git-Paper-248]
	at net.minecraft.server.v1_16_R2.DedicatedPlayerList.y(SourceFile:95) ~[patched_1.16.3.jar:git-Paper-248]
	...
```

This is clearly not understandable to the untrained eye: what is
`jsonarray`? What is `DedicatedPlayerList.y`?

This rather does a proper exception message:

```
[16:42:59 ERROR]: Encountered an unexpected exception
java.lang.NullPointerException: The file "banned-players.json" is either empty or corrupt
	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:787) ~[paper-1.16.3.jar:git-Paper-"8e6d90c2d"]
	at net.minecraft.server.v1_16_R2.JsonList.load(JsonList.java:190) ~[paper-1.16.3.jar:git-Paper-"8e6d90c2d"]
	at net.minecraft.server.v1_16_R2.DedicatedPlayerList.y(SourceFile:95) ~[paper-1.16.3.jar:git-Paper-"8e6d90c2d"]
	...
```

It is still an exception, which server owners may or may not understand,
but the message now says exactly what went wrong, and who would've
known, now we know what `DedicatedPlayerList.y` is, and we know what
file was broken.

This is more of a quality of life change, but it is certainly useful to
the server owners that come into `#paper-help` and the issue tracker
(#4174) to ask for help with unintelligible messages we need to open a
patched Paper project to make any sense out of.

Check state of jsonarray instead of checkNotNull

Co-authored-by: Riley Park <riley.park@meino.net>
2021-03-03 21:56:04 +01:00