SafeNavigationChain doesn't see past blocks

[aquach]

Expected behavior

I expect this code to trigger SafeNavigationChain:

b&.select { true }.join

This should be corrected to

b&.select { true }&.join

Actual behavior

No offense is surfaced.

Steps to reproduce the problem

Try the example above.

RuboCop version

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

This issue was exacerbated by autocorrect for SafeNavigation, which turned a && a.select {}.join into a&.select {}.join, which would be bad if a is nil. But I think the fault lies with SafeNavigationChain for not propagating that through. However, propagation is not always possible, such as in the case of a && a.select {}.length > 1 or a && a.select {}[0].