[Bug c++/70035] [5 Regression] Calling a non-virtual member in base-class constructor call with ubsan causes segfault when superclass has virtual member with same name

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70035

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #9)
> (In reply to Jakub Jelinek from comment #8)
> > Fixed for g++ 6+ so far.
> 
> no. this creates a new problem.
> I see now crashes in valid code that uses the std::stringstream
> when -fsanitize=undefined is used.
> Unfortunately I was not able to reduce the test case.
> 
> But what is wrong can be seen with this simple test case:

That is already tracked in PR70147.