Created attachment 1425097 [details]
Preprocessed source stored into /tmp/ccViQ3Fm.out file, please attach this to your bugreport.

Description of problem:
gcc-c++ crashes on compilation of templated test code.

Version-Release number of selected component (if applicable):
$ /usr/bin/c++ --version
c++ (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)

How reproducible:

every time.

Steps to Reproduce:

1. try to compile a test program (see attachment)
2. crash.
3.

Actual results:

internal compiler error: in emit_move_insn, at expr.c:3698
   temp.rpart() = pow(xx.rpart(), aa);
   ^~~~
Please submit a full bug report,
with preprocessed source if appropriate.


Expected results:

working compiled program.

Additional info:

The original source is here: https://github.com/tesch1/cxxduals crash is in compiling test2.cpp
This is on latest up-to-date fedora 27.  Let me know if you need any other info.

Google finds this: https://gcc.gnu.org/ml/gcc/2017-01/msg00211.html