JVM Crash when connecting to an unreachable server (instead of showing error message)

[17:48:24] [Client thread/INFO]: Connecting to localhost, 25565
[17:48:25] [Server Connector #1/ERROR]: Couldn't connect to server
io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/127.0.0.1:25565
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.8.0_51]
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[?:1.8.0_51]
	at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:325) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:635) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:582) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:499) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at java.lang.Thread.run(Thread.java:745) ~[?:1.8.0_51]
Caused by: java.net.ConnectException: Connection refused: no further information
	... 10 more

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J 6075  org.lwjgl.opengl.GL11.glBindTexture(II)V (0 bytes) @ 0x0000000003544cc4 [0x0000000003544c80+0x44]
J 6476 C2 dci.h()V (10 bytes) @ 0x00000000033c175c [0x00000000033c16e0+0x7c]
j  che.a(Lchf;)Lchg;+32
j  chd.a(Lchf;)Lchg;+31
j  chd.b(C)Lchi;+61
J 6117 C2 chd.a(C)Lchi; (64 bytes) @ 0x0000000003d51710 [0x0000000003d516a0+0x70]
J 6657 C1 cfj.e(Ljava/lang/String;I)I (246 bytes) @ 0x00000000032e6e6c [0x00000000032e6540+0x92c]
J 6673 C1 cfj.d(Ljava/lang/String;I)Ljava/lang/String; (155 bytes) @ 0x0000000003a5be34 [0x0000000003a5bc20+0x214]
j  cfj.c(Ljava/lang/String;I)Ljava/util/List;+3
j  cik.c()V+21
j  cix.a(Lces;II)V+50
j  ces.a(Lcix;)V+129
j  cie$1.run()V+337
v  ~StubRoutines::call_stub

20:27:18	bkr	Connecting to localhost, 25566
20:27:19	bkr	Couldn't connect to server
io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/127.0.0.1:25566
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:352)
	at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:612)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:559)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:476)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: no further information
	... 10 more