/in/foo.cc: In function 'bool isPrime(int)':
/in/foo.cc:7:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(i = 2; i * i <= x; i++) 
     ^~~
/in/foo.cc:10:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  return true;
  ^~~~~~