compiler: Fix handling of redundant derivatives

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (b7016f2) 86.84% compared to head (8f50425) 86.85%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2284 +/- ## ========================================== + Coverage 86.84% 86.85% +0.01% ========================================== Files 229 229 Lines 42548 42579 +31 Branches 7893 7900 +7 ========================================== + Hits 36951 36984 +33 + Misses 4940 4939 -1 + Partials 657 656 -1 ```

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