/in/foo.cc: In function 'int main()':
/in/foo.cc:19:5: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
     else
     ^~~~
/in/foo.cc:21:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
    return 0;
    ^~~~~~