Range violation error when reading from a file

[Samir]

I am trying to read from a text file using the following code:

import std.stdio;
import std.string;

void main() {
     File file = File("test.txt");
     string line;

     while (!file.eof()) {
         line = strip(file.readln());
         if (line[0] == '>') {         // line 10
             writeln(line[1..$]);
         }
         else {
             writeln(line);
         }
     }
}

and I get the following error AFTER the last line is processed:

core.exception.RangeError at readfile.d(10): Range violation
----------------
??:? _d_arrayboundsp [0x448efa]
??:? _Dmain [0x4459f7]

Any idea what I am doing wrong?  When processing the if statement 
or writing the slice, am I inadvertently trying to read a 
non-existent line in the file?

Thanks in advance
Samir