/in/foo.cc: In function 'int merge(int, int)':
/in/foo.cc:18:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(!a) return b; if(!b) return a;//?????
  ^~
/in/foo.cc:18:19: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  if(!a) return b; if(!b) return a;//?????
                   ^~