Package: g++-6
Version: 6.2.0-13
Severity: normal

Dear Maintainer,

This program fails:
``` c++
#include <cstdint>

int main()
    uint64_t toto = 800*16'800'000; // *should* be 10'080'000'000 
    return 0;

when compiled with:

``` make
    g++ -Wall -std=c++14 main.cpp -o main.out

But it does work if I make the calculation myself.
g++ issued a warning (-Woverflow) and there was an overflow.
Expected result is 10'080'000'000 which fits in uint64_t, but got an
overflow instead.

Best regards,


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-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-1-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages g++-6 depends on:
ii  gcc-6            6.2.0-13
ii  gcc-6-base       6.2.0-13
ii  libc6            2.24-7
ii  libgmp10         2:6.1.1+dfsg-1
ii  libisl15         0.17.1-1
ii  libmpc3          1.0.3-1
ii  libmpfr4         3.1.5-1
ii  libstdc++-6-dev  6.2.0-13
ii  zlib1g           1:1.2.8.dfsg-2+b3

g++-6 recommends no packages.

Versions of packages g++-6 suggests:
pn  g++-6-multilib    <none>
pn  gcc-6-doc         <none>
pn  libstdc++6-6-dbg  <none>

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