foo.cc: In function 'int mull(int*, int, int)':
foo.cc:7:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    7 |         for(int j=1;j<=len;j++)
      |         ^~~
foo.cc:15:12: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   15 |            return len;
      |            ^~~~~~

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