Readline thread which didn't respond to kill

gistfile1.txt

```
"NonBlockingInputStreamThread" daemon prio=10 tid=0x00007f55c4018800 nid=0x2294 in Object.wait() [0x00007f55fa726000]                                                                                      [153/516]
   java.lang.Thread.State: WAITING (on object monitor)                                                                                                                                                     [152/516]
        at java.lang.Object.wait(Native Method)                                                                                                                                                            [151/516]
        - waiting on <0x00000000faca1e98> (a jline.internal.NonBlockingInputStream)                                                                                                                        [150/516]
        at jline.internal.NonBlockingInputStream.run(NonBlockingInputStream.java:278)                                                                                                                      [149/516]
        - locked <0x00000000faca1e98> (a jline.internal.NonBlockingInputStream)                                                                                                                            [148/516]
        at java.lang.Thread.run(Thread.java:745)                                                                                                                                                           [147/516]

"Ruby-0-Thread-2: a.rb:1" daemon prio=10 tid=0x00007f560c9a7800 nid=0x228c runnable [0x00007f55fa926000]
   java.lang.Thread.State: RUNNABLE
        at java.io.FileInputStream.read0(Native Method)
        at java.io.FileInputStream.read(FileInputStream.java:210)
        at jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169)
        - locked <0x00000000faca1e98> (a jline.internal.NonBlockingInputStream)
        at jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:137)
        at jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:246)
        at jline.internal.InputStreamReader.read(InputStreamReader.java:261)
        - locked <0x00000000faca1e98> (a jline.internal.NonBlockingInputStream)
        at jline.internal.InputStreamReader.read(InputStreamReader.java:198)
        - locked <0x00000000faca1e98> (a jline.internal.NonBlockingInputStream)
        at jline.console.ConsoleReader.readCharacter(ConsoleReader.java:2038)
        at jline.console.ConsoleReader.readLine(ConsoleReader.java:2242)
        at jline.console.ConsoleReader.readLine(ConsoleReader.java:2162)
        at org.jruby.ext.readline.Readline.s_readline(Readline.java:177)
        at org.jruby.ext.readline.Readline.s_readline(Readline.java:163)
        at org.jruby.ext.readline.Readline.s_readline(Readline.java:223)
        at org.jruby.ext.readline.Readline$INVOKER$s$s_readline.call(Readline$INVOKER$s$s_readline.gen)
        at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:293)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:131)
        at a.invokeOther0:readline(a.rb)
        at a.RUBY$block$\=a\,rb$0(a.rb:3)
        at java.lang.invoke.LambdaForm$DMH/1106614545.invokeStatic_LLLLLLL_L(LambdaForm$DMH)
        at java.lang.invoke.LambdaForm$MH/2121704328.invokeExact_MT(LambdaForm$MH)
        at org.jruby.runtime.CompiledIRBlockBody.commonYieldPath(CompiledIRBlockBody.java:68)
        at org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:75)
        at org.jruby.runtime.Block.call(Block.java:106)
        at org.jruby.RubyProc.call(RubyProc.java:326)
        at org.jruby.RubyProc.call(RubyProc.java:235)
        at org.jruby.internal.runtime.RubyRunnable.run(RubyRunnable.java:99)
        at java.lang.Thread.run(Thread.java:745)
```