Using -Wall and -Woverloaded-virtual together changes the behaviour of the code

[Jonathan Wakely]

On 23 March 2018 at 18:16, Vadim Zeitlin wrote:
>  Just to be clear, this is what bothers me the most: how can these warnings
> options affect the optimizer output? Shouldn't this be "impossible"?

Yes, they should have no effect on the generated code.