From aafa4c48e5a07d87c5df9b6c0e1a92df6fd8dbd2 Mon Sep 17 00:00:00 2001
From: Guantao Liu <guantaol@google.com>
Date: Mon, 29 Apr 2019 16:10:53 -0700
Subject: [PATCH] Fix another call of Alarm::experimental()::Set.

---
 test/cpp/qps/client_callback.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/test/cpp/qps/client_callback.cc b/test/cpp/qps/client_callback.cc
index e61e36c9ee1..ade23e13a72 100644
--- a/test/cpp/qps/client_callback.cc
+++ b/test/cpp/qps/client_callback.cc
@@ -293,7 +293,10 @@ class CallbackStreamingPingPongReactor final
       gpr_timespec next_issue_time = client_->NextRPCIssueTime();
       // Start an alarm callback to run the internal callback after
       // next_issue_time
-      ctx_->alarm_.experimental().Set(next_issue_time, [this](bool ok) {
+      if (ctx_->alarm_ == nullptr) {
+        ctx_->alarm_.reset(new Alarm);
+      }
+      ctx_->alarm_->experimental().Set(next_issue_time, [this](bool ok) {
         write_time_ = UsageTimer::Now();
         StartWrite(client_->request());
       });