http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57323
Bug ID: 57323 Summary: Overloaded && operator evaluates operands in the wrong order Product: gcc Version: 4.7.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: calli911 at web dot de Created attachment 30143 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30143&action=edit The preprocessed source file. The overloaded logical AND operator "&&" evaluates its operands in the wrong order. In the following code example the operator behaves differently when used with objects of a class than it does when using it with integers. int main() { Class x1(11); Class x2(22); int y1 = 11; int y2 = 22; f1(x1) && 0 && f2(x2); g1(y1) && 0 && g2(y2); return 0; } The function f2 gets called before f1 although it should not get called because g2 does not get called either. Executed command: g++ -v -save-temps bug.cpp Output: Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/i486-linux-gnu/4.7/lto-wrapper Target: i486-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.7.2-5' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.7 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --enable-targets=all --with-arch-32=i586 --with-tune=generic --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu Thread model: posix gcc version 4.7.2 (Debian 4.7.2-5) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=i586' /usr/lib/gcc/i486-linux-gnu/4.7/cc1plus -E -quiet -v -imultiarch i386-linux-gnu -D_GNU_SOURCE bug.cpp -mtune=generic -march=i586 -fpch-preprocess -o bug.ii ignoring nonexistent directory "/usr/local/include/i386-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/i486-linux-gnu/4.7/../../../../i486-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/include/c++/4.7 /usr/include/c++/4.7/i486-linux-gnu /usr/include/c++/4.7/backward /usr/lib/gcc/i486-linux-gnu/4.7/include /usr/local/include /usr/lib/gcc/i486-linux-gnu/4.7/include-fixed /usr/include/i386-linux-gnu /usr/include End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=i586' /usr/lib/gcc/i486-linux-gnu/4.7/cc1plus -fpreprocessed bug.ii -quiet -dumpbase bug.cpp -mtune=generic -march=i586 -auxbase bug -version -o bug.s GNU C++ (Debian 4.7.2-5) version 4.7.2 (i486-linux-gnu) compiled by GNU C version 4.7.2, GMP version 5.0.5, MPFR version 3.1.0-p10, MPC version 0.9 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C++ (Debian 4.7.2-5) version 4.7.2 (i486-linux-gnu) compiled by GNU C version 4.7.2, GMP version 5.0.5, MPFR version 3.1.0-p10, MPC version 0.9 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 62bfd556e00a93e3d7f66f6876d73826 COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=i586' as -v --32 -o bug.o bug.s GNU assembler version 2.22 (i486-linux-gnu) using BFD version (GNU Binutils for Debian) 2.22 COMPILER_PATH=/usr/lib/gcc/i486-linux-gnu/4.7/:/usr/lib/gcc/i486-linux-gnu/4.7/:/usr/lib/gcc/i486-linux-gnu/:/usr/lib/gcc/i486-linux-gnu/4.7/:/usr/lib/gcc/i486-linux-gnu/ LIBRARY_PATH=/usr/lib/gcc/i486-linux-gnu/4.7/:/usr/lib/gcc/i486-linux-gnu/4.7/../../../i386-linux-gnu/:/usr/lib/gcc/i486-linux-gnu/4.7/../../../../lib/:/lib/i386-linux-gnu/:/lib/../lib/:/usr/lib/i386-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/i486-linux-gnu/4.7/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic' '-march=i586' /usr/lib/gcc/i486-linux-gnu/4.7/collect2 --sysroot=/ --build-id --no-add-needed --eh-frame-hdr -m elf_i386 --hash-style=both -dynamic-linker /lib/ld-linux.so.2 /usr/lib/gcc/i486-linux-gnu/4.7/../../../i386-linux-gnu/crt1.o /usr/lib/gcc/i486-linux-gnu/4.7/../../../i386-linux-gnu/crti.o /usr/lib/gcc/i486-linux-gnu/4.7/crtbegin.o -L/usr/lib/gcc/i486-linux-gnu/4.7 -L/usr/lib/gcc/i486-linux-gnu/4.7/../../../i386-linux-gnu -L/usr/lib/gcc/i486-linux-gnu/4.7/../../../../lib -L/lib/i386-linux-gnu -L/lib/../lib -L/usr/lib/i386-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/i486-linux-gnu/4.7/../../.. bug.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/i486-linux-gnu/4.7/crtend.o /usr/lib/gcc/i486-linux-gnu/4.7/../../../i386-linux-gnu/crtn.o