c88cb08afc
When there is are multiple references where one of the references isn't mutable then this results in a false-positive for `mut_mutex_lock` as it only checks the mutability of the first reference level. Fix this by using `peel_mid_ty_refs_is_mutable` which correctly determines whether the reference is ultimately mutable and thus whether `Mutex::get_lock()` can actually be used. Fixes #9854
40 lines
1017 B
Rust
40 lines
1017 B
Rust
#![allow(dead_code, unused_mut)]
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#![warn(clippy::mut_mutex_lock)]
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use std::sync::{Arc, Mutex};
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fn mut_mutex_lock() {
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let mut value_rc = Arc::new(Mutex::new(42_u8));
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let value_mutex = Arc::get_mut(&mut value_rc).unwrap();
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let mut value = value_mutex.get_mut().unwrap();
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*value += 1;
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let mut value_mutex = Mutex::new(42_u8);
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let mut_ref_mut_ref_mutex = &mut &mut value_mutex;
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let mut value = mut_ref_mut_ref_mutex.get_mut().unwrap();
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*value += 1;
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}
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fn no_owned_mutex_lock() {
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let mut value_rc = Arc::new(Mutex::new(42_u8));
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let mut value = value_rc.lock().unwrap();
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*value += 1;
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}
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fn issue9415() {
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let mut arc_mutex = Arc::new(Mutex::new(42_u8));
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let arc_mutex: &mut Arc<Mutex<u8>> = &mut arc_mutex;
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let mut guard = arc_mutex.lock().unwrap();
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*guard += 1;
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}
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fn mut_ref_ref_mutex_lock() {
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let mutex = Mutex::new(42_u8);
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let mut_ref_ref_mutex = &mut &mutex;
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let mut guard = mut_ref_ref_mutex.lock().unwrap();
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*guard += 1;
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}
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fn main() {}
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