Range violation error when reading from a file

[aliak]

On Tuesday, 18 June 2019 at 01:15:54 UTC, Samir wrote:
> On Monday, 17 June 2019 at 03:46:11 UTC, Norm wrote:
>> On Monday, 17 June 2019 at 00:22:23 UTC, Samir wrote:
>
>>> Any suggestions on how to rectify?
>>
>> You could change the IF to
>>
>> `if(line.length > 0 && line[0] == '>')`
>
> Thanks, Norm.  That seemed to do the trick and fixed the error.
>
> On Monday, 17 June 2019 at 11:25:01 UTC, aliak wrote:
>> On Monday, 17 June 2019 at 00:22:23 UTC, Samir wrote:
>
>>> HOWEVER, the output is interesting.  There IS a blank line 
>>> between the last line and the prompt:
>>
>> That's because you're using write*ln*. So even though line is 
>> empty, you still output a new line.
>
> Curious.  I am going to have to think about that for a bit as I 
> don't quite understand.

I mean this:

$ dmd -run readfile.d
1)
file.eof() == false
line = "> line 1"
writeln("lines 1" + \n);
2)
file.eof() == false
line = line 2
writeln("line 2" + \n);
3)
file.eof() == false
line = line 3
writeln("line 3" + \n);
4)
file.eof() == false
line = > line 4
writeln("> line 4" + \n);
5)
file.eof() == false
line = line 5
writeln("line 5" + \n);
6)
file.eof() == false
line = "" // empty since there're no lines left in file
writeln("" + \n); <-- this is your blank line
7)
file.eof() == true