Reviewer feedback

include/grpc++/impl/codegen/call.h

@@ -558,10 +558,11 @@ class CallOpRecvInitialMetadata {
 
 class CallOpClientRecvStatus {
  public:
-  CallOpClientRecvStatus() : recv_status_(nullptr) {}
+  CallOpClientRecvStatus() : recv_status_(nullptr), error_string_(nullptr) {}
 
   void ClientRecvStatus(ClientContext* context, Status* status) {
-    metadata_map_ = &context->trailing_metadata_;
+    client_context_ = context;
+    metadata_map_ = &client_context_->trailing_metadata_;
     recv_status_ = status;
     error_message_ = g_core_codegen_interface->grpc_empty_slice();
   }
@@ -588,18 +589,21 @@ class CallOpClientRecvStatus {
       binary_error_details =
           grpc::string(iter->second.begin(), iter->second.length());
     }
-    *recv_status_ =
-        Status(static_cast<StatusCode>(status_code_),
-               grpc::string(GRPC_SLICE_START_PTR(error_message_),
-                            GRPC_SLICE_END_PTR(error_message_)),
-               binary_error_details,
-               error_string_ != nullptr ? grpc::string(error_string_) : "");
+    *recv_status_ = Status(static_cast<StatusCode>(status_code_),
+                           grpc::string(GRPC_SLICE_START_PTR(error_message_),
+                                        GRPC_SLICE_END_PTR(error_message_)),
+                           binary_error_details);
+    client_context_->set_debug_error_string(
+        error_string_ != nullptr ? grpc::string(error_string_) : "");
     g_core_codegen_interface->grpc_slice_unref(error_message_);
-    g_core_codegen_interface->gpr_free((void*)error_string_);
+    if (error_string_ != nullptr) {
+      g_core_codegen_interface->gpr_free((void*)error_string_);
+    }
     recv_status_ = nullptr;
   }
 
  private:
+  ClientContext* client_context_;
   MetadataMap* metadata_map_;
   Status* recv_status_;
   const char* error_string_;

include/grpc++/impl/codegen/client_context.h

@@ -348,6 +348,8 @@ class ClientContext {
   /// Applications never need to call this method.
   grpc_call* c_call() { return call_; }
 
+  grpc::string debug_error_string() const { return debug_error_string_; }
+
  private:
   // Disallow copy and assign.
   ClientContext(const ClientContext&);
@@ -374,6 +376,11 @@ class ClientContext {
   template <class InputMessage, class OutputMessage>
   friend class ::grpc::internal::BlockingUnaryCallImpl;
 
+  // Used by friend class CallOpClientRecvStatus
+  void set_debug_error_string(grpc::string debug_error_string) {
+    debug_error_string_ = debug_error_string;
+  }
+
   grpc_call* call() const { return call_; }
   void set_call(grpc_call* call, const std::shared_ptr<Channel>& channel);
 
@@ -412,6 +419,8 @@ class ClientContext {
 
   grpc_compression_algorithm compression_algorithm_;
   bool initial_metadata_corked_;
+
+  grpc::string debug_error_string_;
 };
 
 }  // namespace grpc

include/grpc++/impl/codegen/status.h

@@ -46,16 +46,6 @@ class Status {
         error_message_(error_message),
         binary_error_details_(error_details) {}
 
-  /// Construct an instance with \a code,  \a error_message and
-  /// \a error_details. It is an error to construct an OK status with non-empty
-  /// \a error_message and/or \a error_details.
-  Status(StatusCode code, const grpc::string& error_message,
-         const grpc::string& error_details, const grpc::string& error_string)
-      : code_(code),
-        error_message_(error_message),
-        binary_error_details_(error_details),
-        error_string_(error_string) {}
-
   // Pre-defined special status objects.
   /// An OK pre-defined instance.
   static const Status& OK;
@@ -69,8 +59,6 @@ class Status {
   /// Return the (binary) error details.
   // Usually it contains a serialized google.rpc.Status proto.
   grpc::string error_details() const { return binary_error_details_; }
-  /// Return the full fidelity error string, which includes all child errors.
-  grpc::string error_string() const { return error_string_; }
 
   /// Is the status OK?
   bool ok() const { return code_ == StatusCode::OK; }
@@ -84,7 +72,6 @@ class Status {
   StatusCode code_;
   grpc::string error_message_;
   grpc::string binary_error_details_;
-  grpc::string error_string_;
 };
 
 }  // namespace grpc