is it bug?

[Alexandr Druzhinin]

on win7 64 bits using dmd 2.062 32 bits this code http://dpaste.dzfl.pl 
/6cca43b5 failed with assert failure: 
core.exception.AssertError@std.range(5288): Assertion failure
but on ubuntu 12.04 64 bits, dmd 2.062 64 bit it compiles and works 
rather well. May be I missed something important with it?