Nested fetches combined with arithmetic breaks SafeNavigation

[aquach]

Expected behavior

c = b && b.a.d > 1

I expect that this should be ignored by SafeNavigation, since it use an arithmetic operation that can't be captured with &.

Actual behavior

SafeNavigation cop triggers, and autocorrects to c = b.&a.&d > 1, which is wrong since this could end up running nil > 1.

Steps to reproduce the problem

Try linting the above expression.

RuboCop version

0.52.0 (using Parser 2.4.0.2, running on ruby 2.4.2 x86_64-linux)