I am using protobuf for communication between clients and servers.  When I 
use valgrind to check the client binary, the following messages are listed. 
It seems there is some possible lost memory in 
 __static_initialization_and_destruction_0. But why does this appear? How 
to suppress it?

==2928== 43 bytes in 1 blocks are possibly lost in loss record 549 of 711
==2928==    at 0x4C2B1C7: operator new(unsigned long) (in 
==2928==    by 0x5A0EA88: std::string::_Rep::_S_create(unsigned long, 
unsigned long, std::allocator<char> const&) (in 
==2928==    by 0x5A0F7FA: std::string::_Rep::_M_clone(std::allocator<char> 
const&, unsigned long) (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.16)
==2928==    by 0x5A0FF5B: std::basic_string<char, std::char_traits<char>, 
std::allocator<char> >::basic_string(std::string const&) (in 
==2928==    by 0x529E800: 
const*, int> >::AddFile(google::protobuf::FileDescriptorProto const&, 
std::pair<void const*, int>) (in /usr/lib/libprotobuf.so.7.0.0)
==2928==    by 0x529A677: 
google::protobuf::EncodedDescriptorDatabase::Add(void const*, int) (in 
==2928==    by 0x52677A6: 
google::protobuf::DescriptorPool::InternalAddGeneratedFile(void const*, 
int) (in /usr/lib/libprotobuf.so.7.0.0)
==2928==    by 0x427CB0: 
==2928==    by 0x4507FE: 
==2928==    by 0x44D43D: __static_initialization_and_destruction_0(int, 
int) (ots_protocol.pb.cc:1164)
==2928==    by 0x44D452: 
==2928==    by 0x45C66C: __libc_csu_init (in 

In normal cases, the client runs very well. However, when I increase 
threads to 50, the program receives SIGABRT in __do_global_dtors_aux. The 
backtrace is listed below.

#0  0x000000354ea30265 in raise () from /lib64/libc.so.6
#1  0x000000354ea31d10 in abort () from /lib64/libc.so.6
#2  0x000000354ea6a84b in __libc_message () from /lib64/libc.so.6
#3  0x000000354ea72856 in free () from /lib64/libc.so.6
#4  0x0000000001e433cf in clear (this=0x32a7760) at 
#5  0x0000000001e46668 in ~FileDescriptorTables (this=0x32a76c0) at 
#6  0x000000354ea3368e in __cxa_finalize () from /lib64/libc.so.6
#7  0x00002b47191796a6 in __do_global_dtors_aux () from 
#8  0x0000000000000000 in ?? ()

The message from valgrind and the SIGABRT error indicate that the root 
cause is the Descriptor. But the initialization and destruction of 
Descriptors are done by libprotobuf.so automatically, and I modify nothing 
about them. Anyone has any idea?

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