Exercise 51: Why does get_noisy_and_big return without a return statement?

[MidnightStuff]

I get

main.cpp: In function ‘noisy_and_big* get_noisy_and_big(const char*)’: main.cpp:14:1: warning: no return statement in function returning non-void [-Wreturn-type] 14 | } | ^ constructing noisy noisy and big: a big, big buffer destroying noisy
I don't get why the return was omitted, and why it returns correctly? Thanks.