Package: g++-4.3 Version: 4.3-20080116-1 Severity: minor Obviously we want our compilers to be smart, but I think g++-4.3 is too smart for me. ;-)
In the attached file, compiling with -Wall and -O2 produces a warning: foo.cc: In function ‘int main(int, char**)’: foo.cc:30: warning: ‘tmp.foo::real_foo’ is used uninitialized in this function foo.cc:36: note: ‘tmp.foo::real_foo’ was declared here This is rather confusing, since lines 30 and 36 aren't even in the same function! The code looks right to me, but I'm willing to believe that there's a subtle problem I don't see. g++ needs to report it in a more obvious way, though. (of course, it could be an outright bug in g++, but that seems like a slim possibility) I've seen this problem twice now, both times in the destructor of a smart pointer class. But the same classes are used without any trouble in lots of other places in my code, so I'm not quite sure what's going on. Maybe I just get lucky everywhere else? Daniel -- System Information: Debian Release: lenny/sid APT prefers unstable APT policy: (500, 'unstable'), (500, 'stable') Architecture: i386 (i686) Kernel: Linux 2.6.22-3-686 (SMP w/1 CPU core) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages g++-4.3 depends on: ii gcc-4.3 4.3-20080116-1 The GNU C compiler ii gcc-4.3-base 4.3-20080116-1 The GNU Compiler Collection (base ii libc6 2.7-6 GNU C Library: Shared libraries ii libgmp3c2 2:4.2.2+dfsg-1 Multiprecision arithmetic library ii libmpfr1ldbl 2.3.0.dfsg.1-2 multiple precision floating-point ii libstdc++6-4.3-dev 4.3-20080116-1 The GNU Standard C++ Library v3 (d g++-4.3 recommends no packages. -- no debconf information
#include <string> class foo { class impl; impl *real_foo; foo(); public: foo(const std::string &prefix); ~foo(); }; class foo::impl { public: impl(); ~impl(); void bar(); }; inline foo::foo(const std::string &prefix) : real_foo(new impl) { } inline foo::~foo() { real_foo->bar(); } int main(int argc, char **argv) { foo tmp("foo"); return 0; }