[phobos] opinions on bug 5370

Dmitry Olshansky dmitry.olsh at gmail.com
Thu Aug 4 16:24:31 PDT 2011

On 04.08.2011 7:21, Brad Roberts wrote:
> http://d.puremagic.com/issues/show_bug.cgi?id=5370
> It's listed as a regression, but it looks like a deliberate behavior change.  My personal opinion is that buffers don't
> contain pointers.  They shouldn't participate in garbage collection.
> Either way, a decision needs to be made and either the changes applied or the bug closed as won't fix.
> Thoughts?

When I filed it I was certain it's a regression, I discovered it while 
chasing memory corruption in my D2 port of DMDscript.
All boiled down to "it works untill garbage collection", and then I 
found the cause:  the original code stores pointers to heap allocated 
objects in OutBuffer. So I think it _was_ supposed to be able to hold 
pointers to heap allocated stuff.
Also grep code for:
GC.clrAttr(data.ptr, GC.BlkAttr.NO_SCAN);
I think this made it to scan GC  before array LRU append cache. Nowdays 
this part of code does nothing, since it somehow doesn't point to 
_block_. At any rate, I can wrap up the patch as pull request if I 
convinced anybody.

Dmitry Olshansky

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