C++ clients crash when exceptions are defined in different IDL

1st, I define a simple test.thrift file, as follow

exception MyException {
    1:required i32 code;
    2:optional string message;
}

service MyResource {
    i32 QueryMyResource() throws(1:MyException e);
}

generate source code
class MyResource_QueryMyResource_presult {
 public:
  virtual ~MyResource_QueryMyResource_presult() noexcept;
  int32_t success;*
  MyException e;

  MyResource_QueryMyResource_presult_isset __isset;
  uint32_t read(::apache::thrift::protocol::TProtocol iprot);*
};
 

2nd, I move MyException to other file, as follow

test.thrift

namespace cpp MySpace
include "testc.thrift"

typedef testc.MyException MyException

service MyResource {
    i32 QueryMyResource() throws(1:MyException e);
}

testc.thrift

exception MyException {
    1:required i32 code;
    2:optional string message;
}

generate source code
class MyResource_QueryMyResource_presult {
 public:

  virtual ~MyResource_QueryMyResource_presult() noexcept;
  int32_t success;*
  MyException* e;

  MyResource_QueryMyResource_presultisset _isset;

  uint32_t read(::apache::thrift::protocol::TProtocol iprot);*

};
 

and when client using the interface, client core dump, the core occur in 
funciton uint32_t MyResource_QueryMyResource_presult::read, mark with red line
      case 1:
        if (ftype == ::apache::thrift::protocol::T_STRUCT) {
          xfer += ((this->e)).read(iprot);*
          this->__isset.e = true;
        } else 

{           xfer += iprot->skip(ftype);         }

the MyResource_QueryMyResource_presult field e isn't allocated memory, so client core dump.