int x { 0.5 };

g++ -std=gnu++11 -flto -Wno-narrowing:
int x { 0.5 };
int main() { return 0; }

prathamesh.kulkarni@ex40-01:~$ fsf-toolchain/bin/g++ -flto braced-init.cpp -c -Wno-narrowing -std=gnu++11
prathamesh.kulkarni@ex40-01:~$ fsf-toolchain/bin/g++ -flto braced-init.o
lto1: internal compiler error: in get_constructor, at varpool.c:331
0xd22c43 varpool_node::get_constructor()
	../../src/gcc/varpool.c:331
0xd23af8 varpool_node::assemble_decl()
	../../src/gcc/varpool.c:602
0x6b8633 output_in_order
	../../src/gcc/cgraphunit.c:2137
0x6b8b23 symbol_table::compile()
	../../src/gcc/cgraphunit.c:2378
0x62b025 lto_main()
	../../src/gcc/lto/lto.c:3496