Compilare: main.cpp: In lambda function: main.cpp:123:30: warning: operation on 'idx' may be undefined [-Wsequence-point] 123 | for(;idx < timer;idx = idx = idx | (idx + 1)) { | ~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:123:30: warning: operation on 'idx' may be undefined [-Wsequence-point] main.cpp:123:30: warning: operation on 'idx' may be undefined [-Wsequence-point] main.cpp:123:30: warning: operation on 'idx' may be undefined [-Wsequence-point]