[Bug libstdc++/67399] New: no match for istream::operator==

["prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67399

            Bug ID: 67399
           Summary: no match for istream::operator==
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: prathamesh3492 at gcc dot gnu.org
  Target Milestone: ---

For the following test-case f.cc:
http://pastebin.com/bvMh8NNL

arm-linux-gnueabihf-g++ f.cc fails to compile with following error:
http://pastebin.com/yVMW2g5t
The test-case builds with g++ on x86.

arm-linux-gnueabihf-g++ -v:
Using built-in specs.
COLLECT_GCC=gnu-toolchain/armhf-build/builds/destdir/x86_64-unknown-linux-gnu/bin/arm-linux-gnueabihf-g++
COLLECT_LTO_WRAPPER=/home/bilbo/gnu-toolchain/armhf-build/builds/destdir/x86_64-unknown-linux-gnu/libexec/gcc/arm-linux-gnueabihf/6.0.0/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: /home/bilbo/gnu-toolchain/src/gcc.git/configure
SHELL=/bin/bash --with-bugurl=https://bugs.linaro.org
--with-mpc=/home/bilbo/gnu-toolchain/armhf-build/builds/destdir/x86_64-unknown-linux-gnu
--with-mpfr=/home/bilbo/gnu-toolchain/armhf-build/builds/destdir/x86_64-unknown-linux-gnu
--with-gmp=/home/bilbo/gnu-toolchain/armhf-build/builds/destdir/x86_64-unknown-linux-gnu
--with-gnu-as --with-gnu-ld --disable-libstdcxx-pch --disable-libmudflap
--with-cloog=no --with-ppl=no --with-isl=no --disable-nls --enable-c99
--with-tune=cortex-a9 --with-arch=armv7-a --with-fpu=vfpv3-d16
--with-float=hard --with-mode=thumb --disable-multilib --enable-multiarch
--with-build-sysroot=/home/bilbo/gnu-toolchain/armhf-build/sysroots/arm-linux-gnueabihf
--enable-lto --enable-linker-build-id --enable-long-long --enable-shared
--with-sysroot=/home/bilbo/gnu-toolchain/armhf-build/builds/sysroot-arm-linux-gnueabihf
--enable-languages=c,c++,fortran,lto --enable-checking=yes --disable-bootstrap
--build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu
--target=arm-linux-gnueabihf
--prefix=/home/bilbo/gnu-toolchain/armhf-build/builds/destdir/x86_64-unknown-linux-gnu
Thread model: posix
gcc version 6.0.0 20150817 (experimental) (GCC) 

Thank you,
Prathamesh