Re: VC2008 Bug: optimising static_cast to a virtual base gives C1001 internal compile error

Victor Bazarov wrote:
Carl Daniel [VC++ MVP] wrote:
What if you turn off whole-program optimization, which is on by
default in release builds under 2005 and later?

I tried on 2008 EE, it didn't make a difference. The code that
causes is even simpler:

struct B {};
struct A : virtual B {};

int main()
{
B* b = reinterpret_cast<A*>(0);
}

(no precompiled headers, not "_t" stuff, no unneeded 'return'), and
it ICEs while _compiling_, not after the linker is done with it.

That's a pretty darn simple repro case.

I was able to repro it on 2008 Team Edition. Compiling with any combination
of -Oy -Oi -Ob -Os -Ot works fine, but including -Og, -O1 or -O2 causes the
ICE.

If this is an issue in real code, adding #pragma optimize("g",off) before
and #pragma optimize("g",on) after the function containing the
reinterpret_cast could be a usable workaround.

Has anyone opened a bug report on Connect?

-cd


.

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