Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
remark: calls.cc:4:0: '_Z3subii' will not be inlined into '_Z3sumii' with (cost=Never) at callsite _Z3sumii:1:0; remark: calls.cc:10:0: '_Z3sumii' inlined into 'main' with (cost=45, threshold=337) at callsite main:3:0.1;