After unplug USB cable, java program crashed.

[fy-create]

Using latest 5.2.1 on MacOS, connected with USB serial port.
after unplug USB cable, java program crashed.

A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x0000000135680acd, pid=28481, tid=0x000000000000c103

JRE version: OpenJDK Runtime Environment (8.0) (build 1.8.0-adoptopenjdk-jenkins_2018_05_19_02_01-b00)
Java VM: OpenJDK 64-Bit Server VM (25.71-b00 mixed mode bsd-amd64 compressed oops)
Problematic frame:
C [libNRJavaSerial.jnilib+0x1acd] drain_loop+0x4d

Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

If you would like to submit a bug report, please visit:
http://bugreport.java.com/bugreport/crash.jsp

--------------- T H R E A D ---------------

Current thread is native thread

siginfo: si_signo: 11 (SIGSEGV), si_code: 1 (SEGV_MAPERR), si_addr: 0x000070000e0f2838

Registers:
RAX=0x0000000000000000, RBX=0x000070000e0f27a0, RCX=0x000070000e1760ac, RDX=0xffffffffffffffff
RSP=0x000070000e175fa0, RBP=0x000070000e175fb0, RSI=0x0000000000000000, RDI=0x000000000000003c
R8 =0x0000000000000001, R9 =0x0000000000000000, R10=0x0000000000000001, R11=0x0000000000000247
R12=0x0000000000000000, R13=0x0000000000000000, R14=0x0000000100000000, R15=0x0000000000000000
RIP=0x0000000135680acd, EFLAGS=0x0000000000010206, ERR=0x0000000000000004
TRAPNO=0x000000000000000e

Top of Stack: (sp=0x000070000e175fa0)
0x000070000e175fa0: 000070000e176000 0000000000000000
0x000070000e175fb0: 000070000e175fd0 00007fff20594954
0x000070000e175fc0: 0000000000000000 0000000000000000
0x000070000e175fd0: 000070000e175ff0 00007fff205904a7
0x000070000e175fe0: 0000000000000000 0000000000000000
0x000070000e175ff0: 0000000000000000 0000000000000000
0x000070000e176000: a5ecaf4c39eb0cf3 0000000000000000
0x000070000e176010: 000070000e279000 000070000deed010
0x000070000e176020: 0000000000000000 0000000000000000
0x000070000e176030: 0000000000000001 0000000a0000001f
0x000070000e176040: 0000000000000000 0001000000000000
0x000070000e176050: 0000000000000000 0000000000000000
0x000070000e176060: 0000000000000000 0000000000000000
0x000070000e176070: 0000000000000000 0000000000000000
0x000070000e176080: 0000000000000000 0000000000000000
0x000070000e176090: 0000000135680a80 000070000e0f27a0
0x000070000e1760a0: 0003000000000000 0000003c00000000
0x000070000e1760b0: 000070000e176000 000070000e0f6000
0x000070000e1760c0: 000070000e0f5000 0000000000083000
0x000070000e1760d0: 0000000000001000 00000000000796a3
0x000070000e1760e0: 000070000e176000 000070000e1760ac
0x000070000e1760f0: 0000000000000000 000000000000c103
0x000070000e176100: 00000000000008ff 0000000000000000
0x000070000e176110: 0000000000000000 a5ecdf4c37fc6cf3
0x000070000e176120: 0000000000000000 0000000000000000
0x000070000e176130: 0000000000000000 0000000000000000
0x000070000e176140: 0000000000000000 0000000000000000
0x000070000e176150: 0000000000000000 0000000000000000
0x000070000e176160: 0000000000000000 0000000000000000
0x000070000e176170: 0000000000000000 0000000000000000
0x000070000e176180: 0000000000000000 0000000000000000
0x000070000e176190: 0000000000000000 0000000000000000

Instructions: (pc=0x0000000135680acd)
0x0000000135680aad: 1f 40 00 e8 35 62 00 00 83 38 04 75 40 83 bb 98
0x0000000135680abd: 00 00 00 00 75 37 bf 40 42 0f 00 e8 5b 63 00 00
0x0000000135680acd: 83 bb 98 00 00 00 00 75 24 8b 3b e8 27 63 00 00
0x0000000135680add: 85 c0 75 cf 83 bb 6c 01 00 00 00 74 d0 4c 89 b3

Register to memory mapping:

RAX=0x0000000000000000 is an unknown value
RBX=0x000070000e0f27a0 is an unknown value
RCX=0x000070000e1760ac is an unknown value
RDX=0xffffffffffffffff is an unknown value
RSP=0x000070000e175fa0 is an unknown value
RBP=0x000070000e175fb0 is an unknown value
RSI=0x0000000000000000 is an unknown value
RDI=0x000000000000003c is an unknown value
R8 =0x0000000000000001 is an unknown value
R9 =0x0000000000000000 is an unknown value
R10=0x0000000000000001 is an unknown value
R11=0x0000000000000247 is an unknown value
R12=0x0000000000000000 is an unknown value
R13=0x0000000000000000 is an unknown value
R14=0x0000000100000000 is an unknown value
R15=0x0000000000000000 is an unknown value

Stack: [0x000070000e0f6000,0x000070000e176000], sp=0x000070000e175fa0, free space=511k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libNRJavaSerial.jnilib+0x1acd] drain_loop+0x4d
C [libsystem_pthread.dylib+0x6954] _pthread_start+0xe0
C [libsystem_pthread.dylib+0x24a7] thread_start+0xf`

[MrDOS]

Thanks for the bug report. This has previously been discussed in #197, and is partially fixed in #211; however, that fix causes a different crash on Windows that I haven't tracked down yet.

If you can do without the HARDWARE_ERROR serial port event feature added in v5.1.0, then you can try using v5.0.2, the newest version which does not have this bug.

[fy-create]

Thanks, v5.0.2 is OK.
I hope next version can fix this issue, both mac and windows. :)