...immutable(char)[] toString() /*const*/
        {
            immutable(char)[] ret;
            return ret;
        }
    }


Expected behavior. HandleSet.DefaultSize is a...

...ret;
   foreach(i; 1 .. 10)
   {
      Foo cur;
      foreach(j; 1 .. 5)
      {
         cur.arr ~= j;
      }
      ret...

...algorithm.d(3358): Error: cannot modify struct
ret._current Tuple!(const(int), uint) with immutable...

...M src/toir.c

  Log Message:
  -----------
  enum RET -> RET


  Commit: 0d925f755f5ec43bbb3a60a9129938f5399c0fe9
      https://github.com/D...

...pop EDI
    pop ESI
    add ESP, 0ACh
    ret


// Without void:
Dmain:
    sub ESP, 0ACh
    mov...

...movq    0xf8(%rbp),%rax
0000000100000b95        leave
0000000100000b96        ret
0000000100000b97        nopl    0x00(%rax,%rax)

-- 
Configure issuemail...

...0xd8(%rbp),%edx
0000000000000044    popq    %rbp
0000000000000045    ret
0000000000000046    nopw    %cs:_foo(%rax,%rax)
_bar...

...pop    RBX
        mov    RSP,RBP
        pop    RBP
        ret
        nop

_D5test34sum2FxAiZi:
        push    RBP
        mov    RBP,RSP...

...eax,eax
  2b:   c9                      leave
  2c:   c3                      ret
  2d:   0f 1f 00                nop    DWORD PTR...

...EAX,EAX
        mov    RSP,RBP
        pop    RBP
        ret

The opcode for BH is being generated...