internal compiler error: in replace_placeholders_r, at cp/tree.c:2804

$ lsb_release -rd
Description: Ubuntu 16.04.6 LTS
Release: 16.04
$ apt-cache policy gcc-7
gcc-7:
  Installed: 7.4.0-1ubuntu1~16.04~ppa1
  Candidate: 7.4.0-1ubuntu1~16.04~ppa1
  Version table:
 *** 7.4.0-1ubuntu1~16.04~ppa1 500
        500 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status
$ g++ --version
g++ (Ubuntu 7.4.0-1ubuntu1~16.04~ppa1) 7.4.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ g++ -std=c++17 bench.preprocessed.cpp
bench.cpp: In function ‘std::vector<double> build_matrix()’:
bench.cpp:58:18: internal compiler error: in replace_placeholders_r, at cp/tree.c:2804
   std::generate_n(std::back_inserter(matrix), count, generator{});
   ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.