Template mixin scope seems to have a weird behavior:

I don't understand 'WEIRD(1)' and 'WEIRD(2)' below.

import std.stdio;

struct A{

  int b;

  this(int b){

    this.b=b;

    writeln("A.begin");

  }

  ~this(){

    writeln("A.end");

  }

}

mixin template Entry(){

  auto a=A(12);

}

void test1(){

  writeln("test.begin");

  mixin Entry;

  writeln(a.b);//WEIRD! destructor has been called but a.b is still alive

  writeln("test.end");

}

void test2(){

  writeln("test.begin");

  auto a=A(0);

  writeln("test.end");

}

void test3(){

  writeln("test.begin");

  mixin("auto a=A(0);");

  writeln("test.end");

}

void main(){

  test1;

  writeln;

  test2;

  writeln;

  test3;

}

output:

----------------

test.begin

A.begin

A.end //WEIRD(1): why is destructor called before test.end?

12 //WEIRD(2): destructor has been called but a.b is still alive

test.end

test.begin

A.begin

test.end

A.end

test.begin

A.begin

test.end

A.end

----------------