On 02.06.2017 16:03, FreeSlave wrote:
As known this code will not work as we may expect:
import std.stdio;
void main(string[] args)
{
void delegate ()[] delegates;
foreach(i; 0..10) {
int j = i;
delegates ~= delegate() {
writeln(j);
};
}
foreach(dlgt; delegates) {
dlgt();
}
}
All delegates will capture the last value of 'j'.
dmd does not complain about such case at all. Once I made this mistake
myself but noticed it thanks to unittesting. Recently I found similar
erroneous code in dlangui (no PR yet). Probably there are more projects
that have the same mistake unnoticed.
May be compiler should produce error or at least generate warning on
this code.
It should just generate correct code. This is a compiler bug.
https://issues.dlang.org/show_bug.cgi?id=2043
