[Bug c++/61276] warn about possible coding errors with logical not (!)

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61276

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Manuel López-Ibáñez from comment #0)
> GCC should have this warning which would have detected several obvious bugs
> in GCC itself.

And at least 60 bugs in Fedora Linux, based on compiling
Fedora Linux with clang.

It would also find an unknown number of bugs in Linux kernel,
which compiles with gcc only, sadly.