https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71011
--- Comment #3 from Pranith Kumar <bobby.prani at gmail dot com> --- Command which shows this error: $ g++ -o .opt_build/src/allocate.o -c -O3 -std=c++11 -funroll-loops -Werror -Wuninitialized -Wno-write-strings -DLONG_COUNTERS -DNO_MPI -DNO_DEBUG src/allocate.i -Wall -Wextra
