The bug
When selecting a server to play on in the "Multiplayer" menu, if the last server on your server list is selected, and there is a local network server on the list below it, pressing the "Down" arrow key will cause a crash.
Crash report
18w02a\: [^crash-2018-01-12_20.42.32-client.txt]
Description: keyPressed event handler
java.lang.IndexOutOfBoundsException: Index: 10, Size: 9
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at bpo$b.a(SourceFile:100)
at bpo$b.get(SourceFile:95)
at btm.b(SourceFile:338)
at btm.keyPressed(SourceFile:286)
at bny.a(SourceFile:269)
at bny$$Lambda$364/75867593.run(Unknown Source)
at brs.a(SourceFile:426)
at bny.a(SourceFile:267)
at bny$$Lambda$270/2088661957.invoke(Unknown Source)
at org.lwjgl.glfw.GLFWKeyCallbackI.callback(GLFWKeyCallbackI.java:23)
at org.lwjgl.system.JNI.invokeV(Native Method)
at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:2599)
at bol.a(SourceFile:294)
at bob.b(SourceFile:848)
at bob.a(SourceFile:382)
at net.minecraft.client.main.Main.main(SourceFile:140)Linked issues
is duplicated by 1
relates to 1
Attachments
Comments 8
Confirmed. This only happens if there is a LAN server in the list, though; if there is no LAN server on the list, then nothing happens.
I think this is caused by the following:
Minecraft might have an array or arraylist of servers (except for LAN) that appear in the server selection menu. When the down arrow is pressed, Minecraft tries to increment the index of the selected server. There is, of course, a check to make sure that you can't go beyond the bounds of the array/arraylist. The bound would be finding the total number of servers on the list, including the LAN servers. So when the last server is selected and the down arrow is pressed, Minecraft increments the index beyond the bounds of the array/arraylist, causing the exception
Source: Just an idea, might be completely wrong.
If I recall correctly, it is something like that (bounds-checking against one list but not the other list, or using the wrong list's size).
what it's doing it it's checking for lan array and server array as two separate arrays without checks for when it's last of server and down. Or first up on land and up arrow key
so the solution is to either switch arrays when the key goes out of bounds or to prevent it entirely from switching indexes from one list to another
Please attach the crashlog.