Bug in File.byRecord ?

[closescreen via Digitalmars-d-learn]

I have a file with empty lines: 2,3 and 5,6

filename.csv (with linenumbers for better view in this message)
1>Joe,Carpenter,300000
2>
3>
4>Fred,Blacksmith,400000
5>
6>

Now, if I run:
rdmd 
--eval='"filename.csv".File.byRecord!(string,string,int)("%s,%s,%d").writeln'

It prints:

[Tuple!(string, string, int)("Joe", "Carpenter", 300000),
  Tuple!(string, string, int)("Joe", "Carpenter", 300000),
  Tuple!(string, string, int)("Joe", "Carpenter", 300000),
  Tuple!(string, string, int)("Fred", "Blacksmith", 400000),
  Tuple!(string, string, int)("Fred", "Blacksmith", 400000),
  Tuple!(string, string, int)("Fred", "Blacksmith", 400000)]

It happens because code in

https://github.com/dlang/phobos/blob/master/std/stdio.d#L297

not checks return value after call formattedRead.

Is this a bug? Or I not understand something?