brpc thrift coredump

Describe the bug (描述bug) 使用thrift server时coredump

To Reproduce (复现方法) 非必现，cpu压力大时容易出现

Expected behavior (期望行为)

Versions (各种版本) OS: CentOS release 7.2 Compiler: gcc-4.8.2-1.el6.x86_64 brpc: 2018年7月下旬的brpc版本 protobuf: 3.5

Additional context/screenshots (更多上下文/截图) (gdb) bt #0 0x00007f43a18b25f7 in raise () from /lib64/libc.so.6 #1 0x00007f43a18b3ce8 in abort () from /lib64/libc.so.6 #2 0x00007f43a18f2317 in __libc_message () from /lib64/libc.so.6 #3 0x00007f43a18f9fe1 in _int_free () from /lib64/libc.so.6 #4 0x00000000007c1bd7 in _M_dispose (__a=..., this=) at /usr/include/c++/4.8.2/bits/basic_string.h:249 #5 ~basic_string (this=0x7f41f4a28698, __in_chrg=) at /usr/include/c++/4.8.2/bits/basic_string.h:539 #6 brpc::Controller::~Controller (this=0x7f41f4a28488, __in_chrg=) at src/brpc/controller.cpp:128 #7 0x000000000089472b in brpc::policy::ThriftClosure::~ThriftClosure (this=0x7f41f4a28400, __in_chrg=) at src/brpc/policy/thrift_protocol.cpp:208 #8 0x0000000000894761 in brpc::policy::ThriftClosure::~ThriftClosure (this=0x7f41f4a28400, __in_chrg=) at src/brpc/policy/thrift_protocol.cpp:210 #9 0x00000000008948dd in operator() (this=, __ptr=0x7f41f4a28400) at /usr/include/c++/4.8.2/bits/unique_ptr.h:67 #10 brpc::policy::ThriftClosure::DoRun (this=0x7f41f4a28400) at /usr/include/c++/4.8.2/bits/unique_ptr.h:184 #11 0x00000000008958cc in brpc::policy::ProcessThriftRequest (msg_base=0x7f4248062720) at src/brpc/policy/thrift_protocol.cpp:548 #12 0x00000000009897ea in brpc::ProcessInputMessage (void_arg=void_arg@entry=0x7f4248062720) at src/brpc/input_messenger.cpp:133 #13 0x000000000098a824 in operator() (this=, last_msg=0x7f4248062720) at src/brpc/input_messenger.cpp:139 #14 brpc::InputMessenger::OnNewMessages (m=0x7f42280642c0) at /usr/include/c++/4.8.2/bits/unique_ptr.h:184 #15 0x00000000009742fd in brpc::Socket::ProcessEvent (arg=0x7f42280642c0) at src/brpc/socket.cpp:1070 #16 0x00000000008e968a in bthread::TaskGroup::task_runner (skip_remained=) at src/bthread/task_group.cpp:293 #17 0x00000000008ec991 in bthread_make_fcontext ()