Finalizer hang after printing

[charignon]

On the latest Mac OS using alacritty, the following minimum project hangs:

(ns foo.core
  (:require [table.core])
  (:gen-class))

(defn -main
  "I don't do a whole lot ... yet."
  [& args]
  (println (table.core/table-str [ [1 2] [3 4]])))

When run with the env variable COLUMNS set to some number it does not hang.
I took a stacktrace of the java process:

"DestroyJavaVM" #15 prio=5 os_prio=31 tid=0x00007fd4d3031800 nid=0x1703 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"clojure-agent-send-off-pool-1" #14 prio=5 os_prio=31 tid=0x00007fd4d2b2c000 nid=0x5803 waiting on condition [0x0000700009414000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x000000076dffeac8> (a java.util.concurrent.SynchronousQueue$TransferStack)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

"clojure-agent-send-off-pool-0" #13 prio=5 os_prio=31 tid=0x00007fd4d19c1000 nid=0x560b waiting on condition [0x0000700009311000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x000000076dffeac8> (a java.util.concurrent.SynchronousQueue$TransferStack)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

"process reaper" #10 daemon prio=10 os_prio=31 tid=0x00007fd4d2b09000 nid=0x5503 waiting on condition [0x000070000920e000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x000000076d5d74f0> (a java.util.concurrent.SynchronousQueue$TransferStack)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

"Service Thread" #9 daemon prio=9 os_prio=31 tid=0x00007fd4d182d800 nid=0x4203 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C1 CompilerThread3" #8 daemon prio=9 os_prio=31 tid=0x00007fd4d181b000 nid=0x3d03 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread2" #7 daemon prio=9 os_prio=31 tid=0x00007fd4d181a000 nid=0x4403 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread1" #6 daemon prio=9 os_prio=31 tid=0x00007fd4d2843000 nid=0x3b03 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #5 daemon prio=9 os_prio=31 tid=0x00007fd4d1042800 nid=0x3a03 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" #4 daemon prio=9 os_prio=31 tid=0x00007fd4d2836800 nid=0x3803 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=31 tid=0x00007fd4d1042000 nid=0x4c03 in Object.wait() [0x0000700008ace000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x000000076f589078> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
        - locked <0x000000076f589078> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:216)

"Reference Handler" #2 daemon prio=10 os_prio=31 tid=0x00007fd4d2806800 nid=0x3303 in Object.wait() [0x00007000089cb000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x000000076f5890d0> (a java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Object.java:502)
        at java.lang.ref.Reference.tryHandlePending(Reference.java:191)
        - locked <0x000000076f5890d0> (a java.lang.ref.Reference$Lock)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)

"VM Thread" os_prio=31 tid=0x00007fd4d1041000 nid=0x4e03 runnable

"GC task thread#0 (ParallelGC)" os_prio=31 tid=0x00007fd4d1018800 nid=0x1e07 runnable

"GC task thread#1 (ParallelGC)" os_prio=31 tid=0x00007fd4d1019000 nid=0x2a03 runnable

"GC task thread#2 (ParallelGC)" os_prio=31 tid=0x00007fd4d1801000 nid=0x2b03 runnable

"GC task thread#3 (ParallelGC)" os_prio=31 tid=0x00007fd4d1019800 nid=0x5303 runnable

"GC task thread#4 (ParallelGC)" os_prio=31 tid=0x00007fd4d101a000 nid=0x2e03 runnable

"GC task thread#5 (ParallelGC)" os_prio=31 tid=0x00007fd4d1802000 nid=0x5103 runnable

"GC task thread#6 (ParallelGC)" os_prio=31 tid=0x00007fd4d1802800 nid=0x3003 runnable

"GC task thread#7 (ParallelGC)" os_prio=31 tid=0x00007fd4d1803000 nid=0x4f03 runnable

"VM Periodic Task Thread" os_prio=31 tid=0x00007fd4d3002000 nid=0x4103 waiting on condition

JNI global references: 232

Heap
 PSYoungGen      total 76288K, used 65242K [0x000000076ab00000, 0x0000000770000000, 0x00000007c0000000)
  eden space 65536K, 86% used [0x000000076ab00000,0x000000076e277118,0x000000076eb00000)
  from space 10752K, 78% used [0x000000076f580000,0x000000076fdbf9e8,0x0000000770000000)
  to   space 10752K, 0% used [0x000000076eb00000,0x000000076eb00000,0x000000076f580000)
 ParOldGen       total 175104K, used 40K [0x00000006c0000000, 0x00000006cab00000, 0x000000076ab00000)
  object space 175104K, 0% used [0x00000006c0000000,0x00000006c000a000,0x00000006cab00000)
 Metaspace       used 19547K, capacity 20838K, committed 20992K, reserved 1064960K
  class space    used 3957K, capacity 4484K, committed 4608K, reserved 1048576K

I am not sure what is causing that though but it is related to table or one of its dependency.

Configuration:

• Clojure 1.10
• Mac OS 10.11.4
• Table 0.5.0