Unexpected behaviour of /x Regexp modifier?

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000.000.002.249-2-P  09-11-2007 15:27:30         102_Low_Alarm
000.000.002.249-2-P  09-11-2007 16:44:18         102_Low_Alarm
000.000.002.249-2-P  09-11-2007 16:44:18         202_Low_Repeat

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while (<>) {
  chomp;
...
             $/x);
  ....
}

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  DB<15> ($a,$b,$c)= ($line =~ m/(\S+)\s+(\d\d-\d\d-\d\d\d\d \d\d:\d\d
+:\d\d)\s+(\S+)$/x ) ;

...
  DB<19> x $line
0  '000.000.002.249-2-P  09-11-2007 15:27:30  102_Low_Alarm'

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