Fix stack corruption

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

@@ -438,9 +438,9 @@ class CallOpServerSendStatus {
         trailing_metadata_count_;
     op->data.send_status_from_server.trailing_metadata = trailing_metadata_;
     op->data.send_status_from_server.status = send_status_code_;
-    grpc_slice status_details = SliceReferencingString(send_status_details_);
+    status_details_slice_ = SliceReferencingString(send_status_details_);
     op->data.send_status_from_server.status_details =
-        send_status_details_.empty() ? nullptr : &status_details;
+        send_status_details_.empty() ? nullptr : &status_details_slice_;
     op->flags = 0;
     op->reserved = NULL;
   }
@@ -457,6 +457,7 @@ class CallOpServerSendStatus {
   grpc::string send_status_details_;
   size_t trailing_metadata_count_;
   grpc_metadata* trailing_metadata_;
+  grpc_slice status_details_slice_;
 };
 
 class CallOpRecvInitialMetadata {

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

@@ -152,7 +152,6 @@ class ServerInterface : public CallHook {
     void* const tag_;
     const bool delete_on_finalize_;
     grpc_call* call_;
-    grpc_metadata_array initial_metadata_array_;
   };
 
   class RegisteredAsyncRequest : public BaseAsyncRequest {

src/cpp/server/server_cc.cc

@@ -576,7 +576,6 @@ ServerInterface::BaseAsyncRequest::BaseAsyncRequest(
       delete_on_finalize_(delete_on_finalize),
       call_(nullptr) {
   call_cq_->RegisterAvalanching();  // This op will trigger more ops
-  memset(&initial_metadata_array_, 0, sizeof(initial_metadata_array_));
 }
 
 ServerInterface::BaseAsyncRequest::~BaseAsyncRequest() {
@@ -627,7 +626,7 @@ ServerInterface::GenericAsyncRequest::GenericAsyncRequest(
   GPR_ASSERT(notification_cq);
   GPR_ASSERT(call_cq);
   grpc_server_request_call(server->server(), &call_, &call_details_,
-                           &initial_metadata_array_, call_cq->cq(),
+                           context->client_metadata_.arr(), call_cq->cq(),
                            notification_cq->cq(), this);
 }