From bc058b8b01ab893b43e981ebdac01b8e5e1f1313 Mon Sep 17 00:00:00 2001
From: Peter van Dijk <peter.van.dijk@powerdns.com>
Date: Fri, 20 Sep 2019 10:03:30 +0200
Subject: [PATCH] pipebackend coprocess: initialise d_pid

---
 modules/pipebackend/coprocess.cc | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/modules/pipebackend/coprocess.cc b/modules/pipebackend/coprocess.cc
index 2da3dacd7..419b53a83 100644
--- a/modules/pipebackend/coprocess.cc
+++ b/modules/pipebackend/coprocess.cc
@@ -50,6 +50,7 @@ CoProcess::CoProcess(const string &command,int timeout, int infd, int outfd): d_
   for (size_t n = 0; n < d_params.size(); n++) {
     d_argv[n]=d_params[n].c_str();
   }
+  d_pid = 0;
 }
 
 void CoProcess::launch()
@@ -103,9 +104,11 @@ void CoProcess::launch()
 CoProcess::~CoProcess()
 {
   int status;
-  if(!waitpid(d_pid, &status, WNOHANG)) {
-    kill(d_pid, 9);
-    waitpid(d_pid, &status, 0);
+  if(d_pid){
+    if(!waitpid(d_pid, &status, WNOHANG)) {
+      kill(d_pid, 9);
+      waitpid(d_pid, &status, 0);
+    }
   }
   
   close(d_fd1[1]);
-- 
2.40.0