Re: [Boost-users] fatal error C1001 with VS2010, boost 1.49, and shared_ptr.hpp

Subject: Re: [Boost-users] fatal error C1001 with VS2010, boost 1.49, and shared_ptr.hpp
From: Lars Viklund (zao_at_[hidden])
Date: 2012-05-01 08:12:47

On Mon, Apr 30, 2012 at 11:56:26AM -0600, Phillip Hellewell wrote:
> On Mon, Apr 30, 2012 at 11:14 AM, Phillip Hellewell <sshock_at_[hidden]> wrote:
> >
> > Good news. Â Luckily I was able to pinpoint the exact line of code
> > causing VS to crash, and two different workarounds:
> >
> > Crashes VS:
> > Â  Â  Â  Â return Foo_ptr(new Foo());
> >
> > Workaround 1:
> > Â  Â  Â  Â return boost::shared_ptr<Foo>(new Foo());
> >
> > Workaround 2:
> > Â  Â  Â  Â Foo_ptr ret(new Foo());
> > Â  Â  Â  Â return ret;
> 
> Oops, I didn't even notice this but the return type on my function is
> Foo_const_ptr (boost::shared_ptr<const Foo>), not Foo_ptr.
> 
> So this is the right fix:
>         return Foo_const_ptr(new Foo());
> 
> I guess VS gets all flustered when:
> 1. Converting an r-value shared_ptr to a non-const object, to a
> shared_ptr to a const object,
> 2. when typedefs are involved,
> 3. in Debug x64 (other configurations weren't crashing).
> 
> There must be some other factors too because when I wrote up a sample
> 10-line program to illustrate the problem, it didn't crash.

Please file a bug over at Connect [1]. ICEs are never good, especially
as this one seems to occur on reasonably well-formed code.

[1] http://connect.microsoft.com/VisualStudio

-- 
Lars Viklund | zao_at_[hidden]