Improve gdb coredump

mysql-test/lib/My/CoreDump.pm

@@ -25,6 +25,8 @@ use File::Temp qw/ tempfile tempdir /;
 sub _gdb {
   my ($core_name)= @_;
 
+  print "\nTrying 'gdb' to get a backtrace\n";
+
   return unless -f $core_name;
 
   my $dir = tempdir( CLEANUP => 1 );
@@ -35,7 +37,7 @@ sub _gdb {
     "quit\n";
 
   # Find out name of binary that generated core
-  my $list= `gdb -c $core_name -x $tmp_name -q 2>&1`
+  my $list= `gdb -c $core_name -x $tmp_name -batch 2>&1`
     or return;
 
   my $binary;
@@ -47,9 +49,9 @@ sub _gdb {
 
   return unless $binary;
 
-  print "Generated by '$binary'\n";
+  print " - core generated by '$binary'\n";
 
-  my $list= `gdb $binary -c $core_name -x $tmp_name -q 2>&1`
+  my $list= `gdb $binary -c $core_name -x $tmp_name -batch 2>&1`
     or return;
 
   print $list, "\n";