protobuf causes crash beacuse of mutex lock

[GoogleCodeExporter]

What steps will reproduce the problem?
FreeBSD 10, it sometimes crashes on SerializeToOstream

    ostringstream os(ios::out | ios::binary);  
    email.SerializeToOstream(&os);

and creates a core of binary here is gdb output:

#0  0x00000000004aa1a1 in google::protobuf::internal::Mutex::Lock ()
#1  0x00000000004ab767 in google::protobuf::internal::MutexLock::MutexLock ()
#2  0x00000000004aa011 in google::protobuf::internal::LogMessage::Finish ()
#3  0x00000000004aa0e9 in google::protobuf::internal::LogFinisher::operator= ()
#4  0x000000000054e623 in 
google::protobuf::internal::WireFormat::VerifyUTF8StringFallback ()
#5  0x000000000044b7a2 in 
google::protobuf::internal::WireFormat::VerifyUTF8String (
    data=0x8071b5798 "testtir asdas asda sda sdasdasd dadsad n asdasd\nBilgilerinize.\nSayg�lar�mla,\nSibel Kocaku� �ENG�N\nKalite ve �dari ��ler\n<mailto:[email protected]> e:  [email protected]  |\n<http:/"..., size=836, op=google::protobuf::internal::WireFormat::SERIALIZE) at gthr-default.h:199
#6  0x0000000000449007 in emails::Email::SerializeWithCachedSizesToArray 
(this=0x7ffffffed170, target=0x80702b0a2 "word\" xmlns:x=\"urn:schemas-mic 
�$\a\b") at emailInput.pb.cc:43
#7  0x00000000004ac1e7 in 
google::protobuf::MessageLite::SerializePartialToCodedStream ()
#8  0x00000000004ac35d in google::protobuf::MessageLite::SerializeToCodedStream 
()
#9  0x00000000004ac39b in 
google::protobuf::MessageLite::SerializeToZeroCopyStream ()
#10 0x000000000053b2b0 in google::protobuf::Message::SerializeToOstream ()


What version of the product are you using? On what operating system?
protobuf 2.5.0

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 12 Nov 2014 at 10:48