[Bug sanitizer/67515] "invalid vptr" false positive or crash from ubsan for non-virtual call in initializer list

[rogero at howzatt dot demon.co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67515

--- Comment #4 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Ah - apologies -- I'd got the example by stripping down a call in boost::format
and didn't do a full enough check that the code was well formed: I'll report
that UB to boost.

However as Markus says the seg fault remains troublesome.