The analyzer has detected a typo in the loop termination condition.
for (size_t i = 0; v.size(); ++i) sum += v[i];
If the 'v' array is not empty, an infinite loop will occur.
The fixed code:
for (size_t i = 0; i < v.size(); ++i) sum += v[i];
According to Common Weakness Enumeration, potential errors found by using this diagnostic are classified as CWE-835.
You can look at examples of errors detected by the V693 diagnostic.