https://issues.dlang.org/show_bug.cgi?id=12406
Vladimir Panteleev <thecybersha...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P2 |P1
CC| |thecybersha...@gmail.com
--- Comment #2 from Vladimir Panteleev <thecybersha...@gmail.com> ---
Reduced:
////////////////////////////// test.d //////////////////////////////
struct Dg
{
Dg delegate() action;
}
void fn(void delegate()) { }
Dg createDg()
{
int x; fn({ x++; }); // required
Dg dg;
Dg createDg2()
{
int x; void unusedFun() { x++; } // required
//fn({x++;}); // workaround - force closure creation
return Dg(() => dg); // lambda returns garbage instead of dg
}
return dg = Dg(&createDg2);
}
void main()
{
auto dg = createDg();
foreach (i; 0..10)
dg = dg.action();
}
////////////////////////////////////////////////////////////////////
As in the reduced example, you can work around this bug by forcing the compiler
to create a closure for the inner function.
--
