foo.cc: In function 'int main()':
foo.cc:41:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   41 |     for(it=L3.begin(); it!=L3.end(); it++);
      |     ^~~
foo.cc:42:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   42 |  while(1){
      |  ^~~~~
foo.cc:49:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   49 |     for(it=L4.begin(); it!=L4.end(); it++);
      |     ^~~
foo.cc:50:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   50 |  while(1){
      |  ^~~~~

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