[phobos] Looks like more problems with the array append patches

[Steve Schveighoffer]

Working on it now, it's definitely a weird one.  You have to allocate 3 different memory segments, of certain sizes, and then one memory segment has to be no-pointers, where the other isn't.  Then you have to trick the array appending code into copying the no-pointers flag to a pointers-containing block, and then get the corruption to occur.  I hope I can deterministically make it happen.

Ellery's code, which uses appending all over the place, would not deterministically reproduce it (probably 1 out of 4 runs), and that was a huge piece of code.

-Steve



----- Original Message ----
> From: Walter Bright <walter at digitalmars.com>
> To: Discuss the phobos library for D <phobos at puremagic.com>
> Sent: Tue, April 6, 2010 7:30:53 PM
> Subject: Re: [phobos] Looks like more problems with the array append patches
> 
> Thank you. I want it especially because this error slipped through all the other 
> tests that attempted to flush out memory corruption errors in the allocator and 
> gc.

Steve Schveighoffer wrote:
> OK, it will take me a while to 
> make one, but I should be able to do it.
> 
> -Steve
> 
> 
> 
> 
> ----- Original Message ----
>  
> 
>> From: Walter Bright <
> href="mailto:walter at digitalmars.com">walter at digitalmars.com>
>> 
> To: Discuss the phobos library for D <
> ymailto="mailto:phobos at puremagic.com" 
> href="mailto:phobos at puremagic.com">phobos at puremagic.com>
>> 
> Sent: Tue, April 6, 2010 5:55:19 PM
>> Subject: Re: [phobos] Looks like 
> more problems with the array append patches
>> 
>> Thanks much 
> for taking care of this. I'd also like a test case we can    
> 
> add to  
>> the test suite, so we can ensure it never happens 
> again.
>>    
> 
>  
> 
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