Segfault with std.container.Array but not regular dynamic array

[Ali Çehreli]

On 11/27/2012 10:04 AM, Maxim Fomin wrote:
> On Monday, 26 November 2012 at 22:42:53 UTC, Dan wrote:
>> On Monday, 26 November 2012 at 19:14:09 UTC, Joseph Rushton Wakeling
>> wrote:
>>> On 11/26/2012 04:07 PM, Joseph Rushton Wakeling wrote:
>>
>> Ok, now I really want to know why it crashes. I've narrowed it down to
>> an example below. It seems there is a problem with RefCounted being
>> used as value in a map.
>>
>> <skipped rest>
>
> I think it crashes because of using associative array. Assignment to an
> absent aa member causes memory allocation without proper object
> construction, and immediately after compiler issues call to opAssign for
> not-constructed object - that is why "this" pointer is "bogus" on
> entering function.
>
> import std.stdio;
>
> struct S
> {
> int i = 42;
> struct SS
> {
> int ii = 41;
> this(this) { writeln("SS postblit"); }
> void opAssign(SS rhs) { writeln("SS opAssign"); }
> }
> SS ss;
> this(this) { writeln("S postblit"); }
> void opAssign(S rhs)
> {
> writeln("S opAssign");
> }
> ~this()
> {
> writefln("i=%d, ii=%d", i, ss.ii);
> }
> }
>
> S[int] map ;
> // S[2] map;
> // S[] map = [S(), S()];
>
> void main()
> {
> map[1] = S();
> }
>
> AA version on windows 2.060 prints
>
> SS postblit
> S opAssign
> i=42, ii=41
> i=4269990, ii=4269984 //garbage
>
> Switching to dynamic or static array fixes the program.

Same problem under Linux. Somebody, please file this bug! Thank you! :)

Ali