Bug#356316: g++-4.0: -Wnon-virtual-dtor and -Wall produce false warnings

[Ben Hutchings <ben@decadentplace.org.uk>]

Package: g++-4.0
Version: 4.0.2-10
Severity: normal
Tags: upstream

It's generally a design error to have a public non-virtual destructor
in a class that has virtual functions, so I accept that g++ should
warn about that.  However, a protected non-virtual destructor is
normally fine, because it prevents the deletion of a derived class
instances through a pointer to the base class (except in a member
or friend of the base class).  It should be possible to enable
warnings about the first case, as -Wnon-virtual-dtor and -Wall do,
without being warned about the second.

This was reported upstream long ago as #7302.  It actually affects
versions 3.1-4.1 inclusive, but I thought it would be best to report
it on the package for the current version.

Ben.

-- System Information:
Debian Release: 3.1
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.8-2-686
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)