foo.cc: In function 'int main()':
foo.cc:78:22: warning: right operand of comma operator has no effect [-Wunused-value]
   78 |         delete[] a,b,c;
      |                      ^
foo.cc:78:23: warning: right operand of comma operator has no effect [-Wunused-value]
   78 |         delete[] a,b,c;
      |                       ^

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