[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 Andrew Pinski changed: What|Removed |Added Status|NEW |RESOLVED Resolution|--- |DUPLICATE --- Comment #9 from Andrew Pinski --- Dup of bug 78704. *** This bug has been marked as a duplicate of bug 78704 ***
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 Marcin Grzebieluch changed: What|Removed |Added CC||grzebieluch at me dot com --- Comment #8 from Marcin Grzebieluch --- Error is also present on Archlinux gcc 7.1.1: $g++ -c -v test.cpp Using built-in specs. COLLECT_GCC=g++ Target: x86_64-pc-linux-gnu Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --enable-libmpx --with-system-zlib --with-isl --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --enable-gnu-indirect-function --disable-multilib --disable-werror --enable-checking=release Thread model: posix gcc version 7.1.1 20170516 (GCC) COLLECT_GCC_OPTIONS='-c' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/cc1plus -quiet -v -D_GNU_SOURCE test.cpp -quiet -dumpbase test.cpp -mtune=generic -march=x86-64 -auxbase test -version -o /tmp/cchLcJgH.s GNU C++14 (GCC) version 7.1.1 20170516 (x86_64-pc-linux-gnu) compiled by GNU C version 7.1.1 20170516, GMP version 6.1.2, MPFR version 3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory "/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/../../../../x86_64-pc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/../../../../include/c++/7.1.1 /usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/../../../../include/c++/7.1.1/x86_64-pc-linux-gnu /usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/../../../../include/c++/7.1.1/backward /usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include /usr/local/include /usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/include-fixed /usr/include End of search list. GNU C++14 (GCC) version 7.1.1 20170516 (x86_64-pc-linux-gnu) compiled by GNU C version 7.1.1 20170516, GMP version 6.1.2, MPFR version 3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 74aace2f6deb87bb86dbfd7a28ebe524 test.cpp: In function ‘void problem()’: test.cpp:24:7: error: result of ‘operator->()’ yields non-pointer result op->doNothing(); ^~
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 --- Comment #7 from bartek 'basz' szurgot --- maybe it's more related to a particular set of configuration parameters / features enabled, then the released version?
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182
--- Comment #6 from Jonathan Wakely ---
There's something strange about the Debian package then.
$ cat np.cc
struct S
{
int i;
};
template
struct T
{
auto operator->() { return }
S s;
};
template
void problem(T& t)
{
t->i;
}
$ ~/gcc/7.1.0/bin/g++ -c -v np.cc
Using built-in specs.
COLLECT_GCC=/home/jwakely/gcc/7.1.0/bin/g++
Target: x86_64-pc-linux-gnu
Configured with: /home/jwakely/src/gcc/gcc-7/configure
--prefix=/home/jwakely/gcc/7.1.0 --enable-libstdcxx-debug --disable-bootstrap
--disable-liboffloadmic --disable-libmpx --disable-libhsail-rt --without-isl
--enable-languages=c,c++
Thread model: posix
gcc version 7.1.0 (GCC)
COLLECT_GCC_OPTIONS='-c' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/home/jwakely/gcc/7.1.0/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/cc1plus -quiet
-v -D_GNU_SOURCE np.cc -quiet -dumpbase np.cc -mtune=generic -march=x86-64
-auxbase np -version -o /tmp/ccp7MnOW.s
GNU C++14 (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.3.1 20161221 (Red Hat 6.3.1-1), GMP version
6.1.1, MPFR version 3.1.5, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/home/jwakely/gcc/7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/home/jwakely/gcc/7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../include/c++/7.1.0
/home/jwakely/gcc/7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../include/c++/7.1.0/x86_64-pc-linux-gnu
/home/jwakely/gcc/7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/../../../../include/c++/7.1.0/backward
/home/jwakely/gcc/7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/include
/usr/local/include
/home/jwakely/gcc/7.1.0/include
/home/jwakely/gcc/7.1.0/lib/gcc/x86_64-pc-linux-gnu/7.1.0/include-fixed
/usr/include
End of search list.
GNU C++14 (GCC) version 7.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.3.1 20161221 (Red Hat 6.3.1-1), GMP version
6.1.1, MPFR version 3.1.5, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 9c4196dd7cfc6b28dfb404cfbddcbfa6
np.cc: In function ‘void problem(T&)’:
np.cc:16:6: error: result of ‘operator->()’ yields non-pointer result
t->i;
^~
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 --- Comment #5 from bartek 'basz' szurgot --- Created attachment 41626 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41626=edit gcc 6.3 vs gcc 7.1
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 --- Comment #4 from bartek 'basz' szurgot --- on my Debian it works on GCC 7.1.0, but not on GCC 6.3.0 (test script attached): + g++-6 -v Using built-in specs. COLLECT_GCC=g++-6 COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 6.3.0-18' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-6 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 6.3.0 20170516 (Debian 6.3.0-18) + g++-6 -c reduced.cpp reduced.cpp: In function ‘void problem(T&)’: reduced.cpp:16:6: error: result of ‘operator->()’ yields non-pointer result t->i; ^~ + echo 1 1 + g++-7 -v Using built-in specs. COLLECT_GCC=g++-7 COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 7.1.0-7' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 7.1.0 (Debian 7.1.0-7) + g++-7 -c reduced.cpp + echo 0 0
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 --- Comment #3 from Jonathan Wakely --- (In reply to bartek 'basz' szurgot from comment #2) > looks like the problem is gone in GCC-7.1. No, doesn't seem to be.
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 --- Comment #2 from bartek 'basz' szurgot --- looks like the problem is gone in GCC-7.1.
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182
--- Comment #1 from Jonathan Wakely ---
Reduced:
struct S
{
int i;
};
template
struct T
{
auto operator->() { return }
S s;
};
template
void problem(T& t)
{
t->i;
}
[Bug c++/81182] result of ‘operator->()’ yields non-pointer result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81182 Jonathan Wakely changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2017-06-23 Ever confirmed|0 |1
