Re: BUG #16049: log_line_prefix=%a and log_connections -application_name missing - Mailing list pgsql-bugs

Not sure where I messed up yesterday , slimmed patch in attachment

--- postgresql-9.5.19/src/backend/utils/error/elog.c
+++ postgresql-9.5.19/src/backend/utils/error/elog.c
@@ -2354,7 +2354,9 @@
    case 'a':
      if (MyProcPort)
 {
-     const char *appname = application_name;
+
+   //    ereport(LOG, (errmsg(" ++ MyProcPort : [%s] ", application_name)));
+   const char *appname = MyProcPort->application_name;

adding 'MyProcPort->' works great for me
1. why appname =application_name doesn't produce err , but trying to
print application_name value -> SegFault ?