From 5952d5f08f3200e7b7f65ef8568bfef9b4707940 Mon Sep 17 00:00:00 2001
From: Ken Brown <kbrown@cornell.edu>
Date: Sat, 16 Sep 2017 22:04:18 -0400
Subject: [PATCH] cygwin: Remove comparison of 'this' to 'NULL' in _pinfo::kill

Fix all callers.
---
 winsup/cygwin/signal.cc | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc
index fbd2b241e..016fce1de 100644
--- a/winsup/cygwin/signal.cc
+++ b/winsup/cygwin/signal.cc
@@ -260,7 +260,7 @@ _pinfo::kill (siginfo_t& si)
 	}
       this_pid = pid;
     }
-  else if (this && process_state == PID_EXITED)
+  else if (process_state == PID_EXITED)
     {
       this_process_state = process_state;
       this_pid = pid;
@@ -296,8 +296,17 @@ kill0 (pid_t pid, siginfo_t& si)
       syscall_printf ("signal %d out of range", si.si_signo);
       return -1;
     }
-
-  return (pid > 0) ? pinfo (pid)->kill (si) : kill_pgrp (-pid, si);
+  if (pid > 0)
+    {
+      pinfo p (pid);
+      if (!p)
+	{
+	  set_errno (ESRCH);
+	  return -1;
+	}
+      return p->kill (si);
+    }
+  return kill_pgrp (-pid, si);
 }
 
 int