terminate called after throwing an instance of 'std::regex_error'

[poiuty]

/vramfs# make
g++ -Wall -Wpedantic -Werror -std=c++11 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse -I include/ -march=native -O2 -flto -c -o build/util.o src/util.cpp
g++ -Wall -Wpedantic -Werror -std=c++11 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse -I include/ -march=native -O2 -flto -c -o build/memory.o src/memory.cpp
g++ -Wall -Wpedantic -Werror -std=c++11 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse -I include/ -march=native -O2 -flto -c -o build/entry.o src/entry.cpp
g++ -Wall -Wpedantic -Werror -std=c++11 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse -I include/ -march=native -O2 -flto -c -o build/file.o src/file.cpp
g++ -Wall -Wpedantic -Werror -std=c++11 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse -I include/ -march=native -O2 -flto -c -o build/dir.o src/dir.cpp
g++ -Wall -Wpedantic -Werror -std=c++11 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse -I include/ -march=native -O2 -flto -c -o build/symlink.o src/symlink.cpp
g++ -Wall -Wpedantic -Werror -std=c++11 -D_FILE_OFFSET_BITS=64 -I/usr/include/fuse -I include/ -march=native -O2 -flto -c -o build/vramfs.o src/vramfs.cpp
g++ -o bin/vramfs build/util.o build/memory.o build/entry.o build/file.o build/dir.o build/symlink.o build/vramfs.o -pthread -lfuse -l OpenCL

root@ubuntu:~/vramfs# bin/vramfs /tmp/vram 2G
terminate called after throwing an instance of 'std::regex_error'
what(): regex_error
Aborted

[Overv]

You'll need to update to GCC 4.9. Alternatively, remove the regex check and hardcode the size.