Same process to different results?

[Taylor Hillegeist via Digitalmars-d-learn]

When I run the code (compiled on DMD 2.067.1):

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import std.algorithm;
import std.stdio;
import std.range;

string A="AaA";
string B="BbBb";
string C="CcCcC";

void main(){
        int L=25;

  int seg1len=(L-B.length)/2;
  int seg2len=B.length;
  int seg3len=L-seg1len-seg2len;

  (A.cycle.take(seg1len).array
  ~B.cycle.take(seg2len).array
  ~C.cycle.take(seg3len).array).writeln;

  string q = cast(string)
  (A.cycle.take(seg1len).array
  ~B.cycle.take(seg2len).array
  ~C.cycle.take(seg3len).array);

  q.writeln;

}
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I get a weird result of
AaAAaAAaAABbBbCcCcCCcCcCC
A   a   A   A   a   A   A   a   A   A   B   b   B   b   C   c   C 
  c   C   C   c   C   c   C   C

Any ideas why?