In function 'int carryOn(int*, int)',
    inlined from 'int mulHighPrecision(int*, int, int*, int, int*)' at foo.cc:66:25:
foo.cc:36:22: warning: 'maxLen' may be used uninitialized [-Wmaybe-uninitialized]
   36 |     while (pos < len || carry != 0)
      |            ~~~~~~~~~~^~~~~~~~~~~~~
foo.cc: In function 'int mulHighPrecision(int*, int, int*, int, int*)':
foo.cc:53:9: note: 'maxLen' was declared here
   53 |     int maxLen;
      |         ^~~~~~

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