C# 在linux和mono中使用newtonsoft json的分段错误

在Debian 7上运行Mono 3.2.6

在多线程应用程序中使用Newtonsoft.Json反序列化对象时，我的应用程序由于“分段错误”而崩溃

我附加了gdb&以下是输出：

root@ns38225:/home/stress# gdb program 30380
GNU gdb (GDB) 7.4.1-debian
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
program: No such file or directory.
Attaching to process 30380
Reading symbols from /opt/mono-3.0/bin/mono-sgen...done.
Reading symbols from /lib/x86_64-linux-gnu/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libm.so.6
Reading symbols from /lib/x86_64-linux-gnu/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/librt.so.1
Reading symbols from /lib/x86_64-linux-gnu/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libdl.so.2
Reading symbols from /lib/x86_64-linux-gnu/libpthread.so.0...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x798bb10bb700 (LWP 30381)]
Loaded symbols for /lib/x86_64-linux-gnu/libpthread.so.0
Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib/x86_64-linux-gnu/libnss_compat.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libnss_compat.so.2
Reading symbols from /lib/x86_64-linux-gnu/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libnsl.so.1
Reading symbols from /lib/x86_64-linux-gnu/libnss_nis.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libnss_nis.so.2
Reading symbols from /lib/x86_64-linux-gnu/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libnss_files.so.2
0x0000798bb363f8ad in nanosleep () from /lib/x86_64-linux-gnu/libpthread.so.0
Mono support loaded.
(gdb) handle SIGXCPU SIG33 SIG35 SIGPWR nostop noprint
Signal        Stop      Print   Pass to program Description
SIGXCPU       No        No      Yes             CPU time limit exceeded
SIGPWR        No        No      Yes             Power fail/restart
SIG33         No        No      Yes             Real-time event 33
SIG35         No        No      Yes             Real-time event 35
(gdb) continue
Continuing.
[New Thread 0x798bb1105700 (LWP 30432)]
[New Thread 0x798bb0cd4700 (LWP 30433)]
[New Thread 0x798bade0f700 (LWP 30434)]
[New Thread 0x798ba64a2700 (LWP 30435)]
[New Thread 0x798ba5461700 (LWP 30436)]
[New Thread 0x798bae3cd700 (LWP 30437)]
[Thread 0x798ba64a2700 (LWP 30435) exited]
[New Thread 0x798ba64a2700 (LWP 30438)]
[Thread 0x798bae3cd700 (LWP 30437) exited]
[New Thread 0x798bae3cd700 (LWP 30439)]
[Thread 0x798ba5461700 (LWP 30436) exited]

Program received signal SIGSEGV, Segmentation fault.
copy_object_no_checks (obj=obj@entry=0x798bb2f35c40, queue=queue@entry=0x96a200)
    at sgen-copy-object.h:110
110             gboolean has_references = SGEN_VTABLE_HAS_REFERENCES (vt);
(gdb) thread apply all backtrace

Thread 10 (Thread 0x798bae3cd700 (LWP 30439)):
#0  0x0000798bb32d9824 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00000000005c73e4 in suspend_thread (info=0x212c4d0, context=context@entry=
    0x798bae3cb5c0) at sgen-os-posix.c:120
#2  0x00000000005c755b in suspend_handler (sig=<optimized out>, siginfo=<optimized out>,
    context=0x798bae3cb5c0) at sgen-os-posix.c:148
#3  <signal handler called>
#4  0x00000000005ceca6 in sgen_ptr_in_nursery (p=0x798bb2fc03e8)
    at ../../mono/metadata/sgen-gc.h:306
#5  mono_gc_wbarrier_arrayref_copy (dest_ptr=0x798bb2fc03e8, src_ptr=0x798bb2ffac50, count=
    33) at sgen-gc.c:4318
#6  0x0000000000536d94 in ves_icall_System_Array_FastCopy (length=<optimized out>,
    dest_idx=0, dest=<optimized out>, source_idx=0, source=0x798bb2ffac30) at icall.c:782
#7  ves_icall_System_Array_FastCopy (source=0x798bb2ffac30, source_idx=0,
    dest=<optimized out>, dest_idx=0, length=<optimized out>) at icall.c:692
#8  0x0000000041ecfcf6 in ?? ()
#9  0x000000000215fff0 in ?? ()
#10 0x00000000020b9bd8 in ?? ()
#11 0x00000000020b9bd8 in ?? ()
#12 0x00000000005e652b in sgen_fragment_allocator_par_alloc (allocator=0x798bae3cbd30,
    size=133640910515248) at sgen-nursery-allocator.c:475
#13 0x0000000000000000 in ?? ()

Thread 9 (Thread 0x798ba64a2700 (LWP 30438)):
#0  0x0000798bb32d9824 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00000000005c73e4 in suspend_thread (info=0x215f900, context=context@entry=
    0x798ba64a09c0) at sgen-os-posix.c:120
#2  0x00000000005c755b in suspend_handler (sig=<optimized out>, siginfo=<optimized out>,
    context=0x798ba64a09c0) at sgen-os-posix.c:148
#3  <signal handler called>
#4  0x0000000041e1ece4 in ?? ()
#5  0x0000798bb2fb3908 in ?? ()
#6  0x0000000040fa7185 in ?? ()
#7  0x0000000000000004 in ?? ()
#8  0x0000798bb2fb3ac8 in ?? ()
#9  0x0000798bb2ff70a0 in ?? ()
#10 0x0000798bb2ff70a0 in ?? ()
#11 0x0000000000000022 in ?? ()
#12 0x0000000000000022 in ?? ()
#13 0x0000798bb2fb3908 in ?? ()
#14 0x0000000040fadcb0 in ?? ()
#15 0x0000798bb2fb3ac8 in ?? ()
#16 0x0000798bb2ff70a0 in ?? ()
---Type <return> to continue, or q <return> to quit---
#17 0x0000798bb2fb3908 in ?? ()
#18 0x0000000040fadc34 in ?? ()
#19 0x0000798bb2fb3ac8 in ?? ()
#20 0x0000798bb2ff70a0 in ?? ()
#21 0x0000798bb2fb3908 in ?? ()
#22 0x0000000040fadbc8 in ?? ()
#23 0x0000000000000004 in ?? ()
#24 0x0000798bb2fb3908 in ?? ()
#25 0x0000798bb2ff70a0 in ?? ()
#26 0x0000000040fad420 in ?? ()
#27 0x0000798bb2fb3908 in ?? ()
#28 0x0000798ba64a1130 in ?? ()
#29 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x798bade0f700 (LWP 30434)):
#0  0x0000798bb363ecec in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x0000798bb363a339 in _L_lock_926 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x0000798bb363a15b in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00000000005d23a2 in mono_gc_set_skip_thread (skip=0) at sgen-gc.c:5605
#4  0x00000000005889a0 in async_invoke_thread (data=0x0, data@entry=0x9694e0)
    at threadpool.c:1573
#5  0x0000000000584082 in start_wrapper_internal (data=0x2116100) at threads.c:608
#6  start_wrapper (data=0x2116100) at threads.c:653
#7  0x0000000000617971 in thread_start_routine (args=args@entry=0x1de5cb0)
    at wthreads.c:294
#8  0x0000000000627530 in inner_start_thread (arg=0x211bcf0) at mono-threads-posix.c:49
#9  0x0000798bb3637b50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#10 0x0000798bb3381a7d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x798bb0cd4700 (LWP 30433)):
#0  0x0000798bb363ecec in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x0000798bb363a339 in _L_lock_926 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x0000798bb363a15b in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00000000005d23a2 in mono_gc_set_skip_thread (skip=0) at sgen-gc.c:5605
#4  0x00000000005889a0 in async_invoke_thread (data=0x0, data@entry=0x9694e0)
    at threadpool.c:1573
#5  0x0000000000584082 in start_wrapper_internal (data=0x1f50ca0) at threads.c:608
#6  start_wrapper (data=0x1f50ca0) at threads.c:653
#7  0x0000000000617971 in thread_start_routine (args=args@entry=0x1de5be8)
    at wthreads.c:294
#8  0x0000000000627530 in inner_start_thread (arg=0x1f25520) at mono-threads-posix.c:49
#9  0x0000798bb3637b50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#10 0x0000798bb3381a7d in clone () from /lib/x86_64-linux-gnu/libc.so.6
---Type <return> to continue, or q <return> to quit---
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x798bb1105700 (LWP 30432)):
#0  0x0000798bb32d9824 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00000000005c73e4 in suspend_thread (info=0x1f4edf0, context=context@entry=
    0x798bb1104780) at sgen-os-posix.c:120
#2  0x00000000005c755b in suspend_handler (sig=<optimized out>, siginfo=<optimized out>,
    context=0x798bb1104780) at sgen-os-posix.c:148
#3  <signal handler called>
#4  0x0000798bb363f8ad in nanosleep () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x0000000000616c57 in SleepEx (ms=ms@entry=500, alertable=alertable@entry=1)
    at wthreads.c:842
#6  0x0000000000585d83 in monitor_thread (unused=unused@entry=0x0) at threadpool.c:779
#7  0x0000000000584082 in start_wrapper_internal (data=0x1f4e6e0) at threads.c:608
#8  start_wrapper (data=0x1f4e6e0) at threads.c:653
#9  0x0000000000617971 in thread_start_routine (args=args@entry=0x1de5b20)
    at wthreads.c:294
#10 0x0000000000627530 in inner_start_thread (arg=0x1f25770) at mono-threads-posix.c:49
#11 0x0000798bb3637b50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#12 0x0000798bb3381a7d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x798bb10bb700 (LWP 30381)):
#0  0x0000798bb32d9824 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00000000005c73e4 in suspend_thread (info=0x1e687a0, context=context@entry=
    0x798bb10ba7c0) at sgen-os-posix.c:120
#2  0x00000000005c755b in suspend_handler (sig=<optimized out>, siginfo=<optimized out>,
    context=0x798bb10ba7c0) at sgen-os-posix.c:148
#3  <signal handler called>
#4  0x0000798bb363e41e in sem_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x0000000000622d68 in mono_sem_wait (sem=sem@entry=0x9698a0, alertable=alertable@entry=
    1) at mono-semaphore.c:116
#6  0x00000000005a01b5 in finalizer_thread (unused=unused@entry=0x0) at gc.c:1073
#7  0x0000000000584082 in start_wrapper_internal (data=0x1e69370) at threads.c:608
#8  start_wrapper (data=0x1e69370) at threads.c:653
#9  0x0000000000617971 in thread_start_routine (args=args@entry=0x1de5800)
    at wthreads.c:294
#10 0x0000000000627530 in inner_start_thread (arg=0x1e69890) at mono-threads-posix.c:49
#11 0x0000798bb3637b50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#12 0x0000798bb3381a7d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x798bb40ec780 (LWP 30380)):
#0  copy_object_no_checks (obj=obj@entry=0x798bb2f35c40, queue=queue@entry=0x96a200)
---Type <return> to continue, or q <return> to quit---
    at sgen-copy-object.h:110
#1  0x00000000005ef921 in simple_nursery_serial_copy_object_from_obj (queue=0x96a200,
    obj_slot=0x798ba5941e80) at sgen-minor-copy-object.h:206
#2  simple_nursery_serial_scan_object (start=<optimized out>, queue=0x96a200)
    at sgen-scan-object.h:78
#3  0x00000000005cbc77 in sgen_drain_gray_stack (max_objs=max_objs@entry=-1, ctx=...)
    at sgen-gc.c:1192
#4  0x00000000005d1576 in collect_nursery (finish_up_concurrent_mark=0, unpin_queue=0x0)
    at sgen-gc.c:2611
#5  collect_nursery (unpin_queue=0x0, finish_up_concurrent_mark=0) at sgen-gc.c:2483
#6  0x00000000005d1b08 in sgen_perform_collection (requested_size=4080,
    generation_to_collect=0, reason=<optimized out>, wait_to_finish=<optimized out>)
    at sgen-gc.c:3445
#7  0x00000000005e7bf4 in mono_gc_alloc_obj_nolock (vtable=vtable@entry=vtable("string"),
    size=size@entry=4080) at sgen-alloc.c:264
#8  0x00000000005e7dbb in mono_gc_alloc_string (vtable=vtable("string"), size=4080, len=
    2024) at sgen-alloc.c:563
#9  0x00000000408397e0 in ?? ()
#10 0x0000000001e5ef60 in ?? ()
#11 0x0000798baf5f3550 in ?? ()
#12 0x0000798ba4fa4ad8 in ?? ()
#13 0x0000798ba5d3c268 in ?? ()
#14 0x0000798bb2fd8688 in ?? ()
#15 0x0000000000000ff0 in ?? ()
#16 0x00007ffffe9284d0 in ?? ()
#17 0x0000798bb2fd7698 in ?? ()
#18 0x0000798bb40ec758 in ?? ()
#19 0x0000000001e4c198 in ?? ()
#20 0x00000000000007e8 in ?? ()
#21 0x0000000040831394 in ?? ()
#22 0x0000798baff90018 in ?? ()
#23 0x0000798bb2fd7378 in ?? ()
#24 0x0000798bb2cdd1a8 in ?? ()
#25 0x0000798baf58f810 in ?? ()
#26 0x0000000000000000 in ?? ()

root@ns38225：/home/stress#gdb程序30380
GNU gdb（gdb）7.4.1-debian
版权所有（C）2012免费软件基金会。
许可证GPLv3+：GNU GPL版本3或更高版本
这是自由软件：您可以自由更改和重新发布它。
在法律允许的范围内，不存在任何担保。键入“显示复制”
和“显示保修”了解详细信息。
此GDB配置为“x86_64-linux-gnu”。
有关错误报告说明，请参阅：
...
程序：没有这样的文件或目录。
附加到进程30380
从/opt/mono-3.0/bin/mono-sgen读取符号…完成。
正在从/lib/x86_64-linux-gnu/libm.so.6读取符号…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/libm.so.6加载的符号
正在从/lib/x86_64-linux-gnu/librt.so.1读取符号…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/librt.so.1加载的符号
正在从/lib/x86_64-linux-gnu/libdl.so.2读取符号…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/libdl.so.2加载的符号
正在从/lib/x86_64-linux-gnu/libpthread.so.0读取符号…（未找到调试符号）…完成。
[已启用使用libthread_db的线程调试]
使用主机libthread_db library“/lib/x86_64-linux-gnu/libthread_db.so.1”。
[新螺纹0x798BBB10BB700（LWP 30381）]
为/lib/x86_64-linux-gnu/libpthread.so.0加载的符号
正在从/lib/x86_64-linux-gnu/libc.so.6读取符号…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/libc.so.6加载的符号
正在从/lib64/ld-linux-x86-64.so.2…读取符号（未找到调试符号）…完成。
为/lib64/ld-linux-x86-64.so.2加载的符号
正在从/lib/x86_64-linux-gnu/libnss_compat.so.2读取符号…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/libnss_compat.so.2加载的符号
正在从/lib/x86_64-linux-gnu/libnsl.so.1读取符号…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/libnsl.so.1加载的符号
正在从/lib/x86_64-linux-gnu/libnss_nis.so.2读取符号…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/libnss_nis.so.2加载的符号
正在从/lib/x86_64-linux-gnu/libnss_文件中读取符号。so.2…（未找到调试符号）…完成。
为/lib/x86_64-linux-gnu/libnss_文件加载符号。so.2
来自/lib/x86_64-linux-gnu/libpthread.so.0的nanosleep（）中的0x0000798bb363f8ad
单声道支持加载。
（gdb）处理SIGXCPU SIG33 SIG35 SIGPWR nostop noprint
信号停止打印传递至程序说明
超过SIGXCPU否否是CPU时间限制
SIGPWR否否是电源故障/重启
SIG33否否是实时事件33
SIG35否否是实时事件35
（gdb）继续
持续的。
[新螺纹0x798bb1105700（LWP 30432）]
[新螺纹0x798bb0cd4700（LWP 30433）]
[新螺纹0x798bade0f700（LWP 30434）]
[新螺纹0x798ba64a2700（LWP 30435）]
[新螺纹0x798ba5461700（LWP 30436）]
[新螺纹0x798bae3cd700（LWP 30437）]
[线程0x798ba64a2700（LWP 30435）已退出]
[新螺纹0x798ba64a2700（LWP 30438）]
[线程0x798bae3cd700（LWP 30437）已退出]
[新螺纹0x798bae3cd700（LWP 30439）]
[线程0x798ba5461700（LWP 30436）已退出]
程序接收信号SIGSEGV，分段故障。
复制\u对象\u无\u检查（obj=obj@entry=0x798bb2f35c40，队列=queue@entry=0x96a200）
在sgen复制对象。h:110
110 gboolean有\u引用=SGEN\u VTABLE\u有\u引用（vt）；
（gdb）线程应用所有回溯
螺纹10（螺纹0x798bae3cd700（LWP 30439））：
#来自/lib/x86_64-linux-gnu/libc.so.6的SIGSSUSPEND（）中的0 0x00007988BB32D9824
#挂起线程中的1 0x00000000005c73e4（信息=0x212c4d0，上下文=context@entry=
0x798bae3cb5c0）位于sgen os posix.c:120
#挂起处理程序中的2 0x00000000005c755b（sig=，siginfo=，
sgen os posix.c:148处的上下文=0x798bae3cb5c0）
#3  
#4 0x00000000005CEA6在sgen_ptr_in_托儿所（p=0x798bb2fc03e8）
网址：http://mono/metadata/sgen-gc.h:306
#5单声道载波阵列参考副本（目的地ptr=0x798bb2fc03e8，src ptr=0x798bb2ffac50，计数=
33）在sgen gc.c:4318
#ves\u icall\u系统中的6 0x0000000000536d94\u阵列\u快速复制（长度=,，
在icall.c:782处的dest_idx=0，dest=，source_idx=0，source=0x798bb2ffac30）
#7 ves_icall_System_Array_FastCopy（源=0x798bb2ffac30，源=0，
目的地=，目的地idx=0，长度=）在icall.c:692
#8 0x0000000041ecfcf6英寸？？()
#9 0x000000000215fff0英寸？？()
#10 0x00000000020b9bd8英寸？？()
#11 0x00000000020b9bd8英寸？？()
#sgen_片段_分配器_par_alloc中的12 0x00000000005e652b（分配器=0x798bae3cbd30，
sgen托儿所分配器处的尺寸=133640910515248）。c:475
#13 0x0000000000000000英寸？？()
螺纹9（螺纹0x798ba64a2700（LWP 30438））：
#来自/lib/x86_64-linux-gnu/libc.so.6的SIGSSUSPEND（）中的0 0x00007988BB32D9824
#挂起线程中的1 0x00000000005c73e4（信息=0x215f900，上下文=context@entry=
sgen os posix.c:120处的0x798ba64a09c0）
#挂起处理程序中的2 0x00000000005c755b（sig=，siginfo=，
sgen os posix.c:148处的上下文=0x798ba64a09c0）
#3  
#4 0x0000000041e14英寸？？()
#5 0x0000798bb2fb3908英寸？？()
#6 0x0000000040fa7185英寸？？()
#7 0x0000000000000004英寸？？()
#8 0x0000798bb2fb3ac8英寸？？()
#9 0x0000798bb2ff70a0英寸？？()
#10 0x0000798bb2ff70a0英寸？？()
#11 0x0000000000000022英寸？？()
#12 0x0000000000000022英寸？？()
#13 0x0000798bb2fb3908英寸？？()
#14 0x0000000040fadcb0英寸？？()
#15 0x0000798bb2fb3ac8英寸？？()
#16 0x0000798bb2ff70a0英寸？？()
---键入以继续，或键入q以退出---
#17 0x0000798bb2fb3908英寸？？()
#18 0x0000000040fadc34英寸？？()
#19 0x0000798bb2fb3ac8英寸？？()
#20 0x0000798bb2ff70a0英寸？？()
#21 0x0000798bb2fb3908英寸？？()
#22 0x0000000040fadbc8英寸？？()
#23 0x0000000000000004英寸？？()
#24 0x0000798bb2fb3908英寸？？()
#25 0x0000798bb2ff70a0英寸？？()
#26 0x0000
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace TaskStressTest
{
    class IntObj
    {
        public int Int;
    }

    class Program
    {
        static long highestId = 0;
        private static long done = 0;
        static object cntLock = new object();
        static List<IntObj> tIds = new List<IntObj>();

        static void Main(string[] args)
        {
            Thread.Sleep(60000);

            var filePaths = Directory.GetFiles("/home/cs/data", "*.json");
            var fileCount = filePaths.Length;
            var f = 0;

            foreach (var filePath in filePaths)
            {
                var tasks = new List<Task>();
                var file = File.OpenRead(filePath);
                var stream = new StreamReader(file);
                var line = "";

                while (!String.IsNullOrWhiteSpace(line = stream.ReadLine()))
                {
                    var line1 = line;
                    tasks.Add(Task.Run(async() =>
                    {
                        var tId = new IntObj {Int = Thread.CurrentThread.ManagedThreadId};
                        lock (cntLock)
                        {
                            tIds.Add(tId);

                            var ints = tIds.Select(x => x.Int).Distinct().OrderBy(i1 => i1).ToList();
                            var active = ints.Count();

                            if (active > highestId)
                            {
                                highestId = active;
                                Console.WriteLine(active);
                            }
                        }

                        await DoWork(line1);

                        lock (cntLock)
                        {
                            tIds.Remove(tId);
                        }
                    }));
                }

                tasks.ForEach(task =>
                {
                    task.Wait();

                    var doneNow = ++done;
                    //Console.WriteLine("D1 - " + doneNow);
                });
            }

            Console.WriteLine("Done");
        }

        static async Task DoWork(string line)
        {
            try
            {
                JsonConvert.DeserializeObject(line);
            }
            catch (Exception)
            {

            }
        }
    }
}

Stacktrace:

  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) object.__icall_wrapper_mono_gc_alloc_vector (intptr,intptr,intptr) <0xffffffff>
  at (wrapper alloc) object.AllocVector (intptr,intptr) <0xffffffff>
  at Newtonsoft.Json.JsonTextReader..ctor (System.IO.TextReader) <0x0006b>
  at Newtonsoft.Json.JsonConvert.DeserializeObject (string,System.Type,Newtonsoft.Json.JsonSerializerSettings) <0x000af>
  at Newtonsoft.Json.JsonConvert.DeserializeObject (string) <0x00013>
  at TaskStressTest.Program/<>c__DisplayClass28.<DoWork>b__26 () <0x0001b>
  at TaskStressTest.Program.Main (string[]) <0x00134>
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <0xffffffff>

* Assertion: should not be reached at sgen-scan-object.h:111

Stacktrace:

  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) object.__icall_wrapper_mono_gc_alloc_vector (intptr,intptr,intptr) <0xffffffff>
  at (wrapper alloc) object.AllocVector (intptr,intptr) <0xffffffff>
  at System.Array.Resize<T> (T[]&,int) <0x000d3>
  at System.Collections.Generic.List`1.set_Capacity (int) <0x00053>
  at System.Collections.Generic.List`1.GrowIfNeeded (int) <0x0006b>
  at System.Collections.Generic.List`1.Insert (int,T) <0x00047>
  at Newtonsoft.Json.Linq.JContainer.InsertItem (int,Newtonsoft.Json.Linq.JToken,bool) <0x0022e>
  at Newtonsoft.Json.Linq.JProperty.InsertItem (int,Newtonsoft.Json.Linq.JToken,bool) <0x00033>
  at Newtonsoft.Json.Linq.JContainer.AddInternal (int,object,bool) <0x002a6>
  at Newtonsoft.Json.Linq.JContainer.Add (object) <0x0003f>
  at Newtonsoft.Json.Linq.JTokenWriter.AddValue (Newtonsoft.Json.Linq.JValue,Newtonsoft.Json.JsonToken) <0x0003c>
  at Newtonsoft.Json.Linq.JTokenWriter.AddValue (object,Newtonsoft.Json.JsonToken) <0x00043>
  at Newtonsoft.Json.Linq.JTokenWriter.WriteValue (string) <0x0003f>
  at Newtonsoft.Json.JsonWriter.WriteToken (Newtonsoft.Json.JsonReader,int,bool,bool) <0x003bd>
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateJObject (Newtonsoft.Json.JsonReader) <0x000ab>
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader,System.Type,Newtonsoft.Json.Serialization.JsonContract,Newtonsoft.Json.Serialization.JsonProperty,Newtonsoft.Json.Serialization.JsonContainerContract,Newtonsoft.Json.Serialization.JsonProperty,object) <0x000e7>
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader,System.Type,Newtonsoft.Json.Serialization.JsonContract,Newtonsoft.Json.Serialization.JsonProperty,Newtonsoft.Json.Serialization.JsonContainerContract,Newtonsoft.Json.Serialization.JsonProperty,object) <0x000bf>
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader,System.Type,bool) <0x001c7>
  at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader,System.Type) <0x00487>
  at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader,System.Type) <0x0001b>
  at Newtonsoft.Json.JsonConvert.DeserializeObject (string,System.Type,Newtonsoft.Json.JsonSerializerSettings) <0x000d7>
  at Newtonsoft.Json.JsonConvert.DeserializeObject (string) <0x00013>
  at TaskStressTest.Program/<>c__DisplayClass28.<DoWork>b__26 () <0x0001b>
  at TaskStressTest.Program.Main (string[]) <0x0013c>
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        mono() [0x4ad6a1]
        /lib/x86_64-linux-gnu/libpthread.so.0(+0xf030) [0x694d59a22030]
        /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35) [0x694d596bb475]
        /lib/x86_64-linux-gnu/libc.so.6(abort+0x180) [0x694d596be6f0]
        mono() [0x62bcbd]
        mono() [0x62bdf6]
        mono() [0x5ef457]
        mono() [0x5cbc77]
        mono() [0x5d1576]
        mono() [0x5d1b08]
        mono() [0x5e7cba]
        mono() [0x5e7ecb]
        [0x4086d270]