foo.cc: In function ‘int main()’:
foo.cc:12:5: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
   12 |     else
      |     ^~~~
foo.cc:15:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘else’
   15 |         return 0;
      |         ^~~~~~