Checks for invocations of assert_eq! whose arguments are “non-const, const”, which
suggests they could be “actual, expected”.
In a long list of output, one’s eyes naturally go to the last line. Hence, it should be what is unusual, i.e., the “actual” value.
A common source of false positives is “sorted, unsorted” where the check is of the sortedness of a collection that is const.
assert_eq!(x, 0);
Use instead:
assert_eq!(0, x);