foo.cc: In function 'bool is_prime(int)':
foo.cc:8:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (int i=2;i<=x/2;i++)
     ^~~
foo.cc:11:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  return 1;
  ^~~~~~

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