# HG changeset patch
# User Ruslan Ermilov <ru@nginx.com>
# Date 1470343320 -10800
# Node ID 1a1d55834b5cbd984aa6d3947b36a1c93ad26c30
# Parent  09c918460cc67f1c4e9c222e36051dc0343b2c20
Fixed undefined behavior when left shifting signed integer.

diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -884,7 +884,7 @@ ngx_worker_process_init(ngx_cycle_t *cyc
                       "sigprocmask() failed");
     }
 
-    srandom((ngx_pid << 16) ^ ngx_time());
+    srandom(((unsigned) ngx_pid << 16) ^ ngx_time());
 
     /*
      * disable deleting previous events for the listening sockets because