foo.cc: In function 'int main()':
foo.cc:51:30: warning: writing 4 bytes into a region of size 0 [-Wstringop-overflow=]
   51 |                 int b[cnt]={0};
      |                              ^
foo.cc:51:21: note: destination object 'b.67' of size 0
   51 |                 int b[cnt]={0};
      |                     ^

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