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| Empty branch of conditional | Fewer false positive results | The query now recognizes commented blocks more reliably. |

| Expression has no effect | Fewer false positive results | Expressions in template instantiations are now excluded from this query. |

| Resource not released in destructor | Fewer false positive results | Placement new is now excluded from the query. Also fixed an issue where false positives could occur if the destructor body was not in the snapshot. |

| Missing return statement (`cpp/missing-return`) | Visible by default | The precision of this query has been increased from 'medium' to 'high', which makes it visible by default in LGTM. It was 'medium' in release 1.17 and 1.18 because it had false positives due to an extractor bug that was fixed in 1.18. |

| Missing return statement | Fewer false positive results | The query is now produces correct results when a function returns a template-dependent type. |