bors 63ef74b6aa Auto merge of #111717 - Urgau:uplift_fn_null_check, r=oli-obk ... Uplift `clippy::fn_null_check` lint This PR aims at uplifting the `clippy::fn_null_check` lint into rustc. ## `incorrect_fn_null_checks` (warn-by-default) The `incorrect_fn_null_checks` lint checks for expression that checks if a function pointer is null. ### Example ```rust let fn_ptr: fn() = /* somehow obtained nullable function pointer */ if (fn_ptr as *const ()).is_null() { /* ... */ } ``` ### Explanation Function pointers are assumed to be non-null, checking for their nullity is incorrect. ----- Mostly followed the instructions for uplifting a clippy lint described here: https://github.com/rust-lang/rust/pull/99696#pullrequestreview-1134072751 `@rustbot` label: +I-lang-nominated r? compiler		2023-07-11 09:34:48 +00:00
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src	Auto merge of #111717 - Urgau:uplift_fn_null_check, r=oli-obk	2023-07-11 09:34:48 +00:00
Cargo.toml	Upgrade to indexmap 2.0.0	2023-07-03 13:51:54 -07:00