diff options
| -rw-r--r-- | src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs | 13 | ||||
| -rw-r--r-- | src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mutability_errors.rs | 25 |
2 files changed, 37 insertions, 1 deletions
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs index 8e52725e536..8dcaa9c581e 100644 --- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs +++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs @@ -180,6 +180,7 @@ impl InferenceContext<'_> { self.infer_mut_expr(index, Mutability::Not); } Expr::UnaryOp { expr, op: UnaryOp::Deref } => { + let mut mutability = mutability; if let Some((f, _)) = self.result.method_resolutions.get_mut(&tgt_expr) { if mutability == Mutability::Mut { if let Some(deref_trait) = self @@ -187,7 +188,17 @@ impl InferenceContext<'_> { .lang_item(self.table.trait_env.krate, LangItem::DerefMut) .and_then(|l| l.as_trait()) { - if let Some(deref_fn) = self + let ty = self.result.type_of_expr.get(*expr); + let is_mut_ptr = ty.is_some_and(|ty| { + let ty = self.table.resolve_ty_shallow(ty); + matches!( + ty.kind(Interner), + chalk_ir::TyKind::Raw(Mutability::Mut, _) + ) + }); + if is_mut_ptr { + mutability = Mutability::Not; + } else if let Some(deref_fn) = self .db .trait_data(deref_trait) .method_by_name(&Name::new_symbol_root(sym::deref_mut.clone())) diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mutability_errors.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mutability_errors.rs index 95542793915..6fa0e7a5a89 100644 --- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mutability_errors.rs +++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/mutability_errors.rs @@ -1258,4 +1258,29 @@ pub unsafe fn foo(a: *mut A) { "#, ); } + + #[test] + fn regression_15799() { + check_diagnostics( + r#" +//- minicore: deref_mut +struct WrapPtr(*mut u32); + +impl core::ops::Deref for WrapPtr { + type Target = *mut u32; + fn deref(&self) -> &Self::Target { + &self.0 + } +} + +fn main() { + let mut x = 0u32; + let wrap = WrapPtr(&mut x); + unsafe { + **wrap = 6; + } +} +"#, + ); + } } |