diff options
| -rw-r--r-- | crates/hir-ty/src/mir/borrowck.rs | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/crates/hir-ty/src/mir/borrowck.rs b/crates/hir-ty/src/mir/borrowck.rs index a0ea1cc5ef7..a5dd0182eb6 100644 --- a/crates/hir-ty/src/mir/borrowck.rs +++ b/crates/hir-ty/src/mir/borrowck.rs @@ -240,10 +240,14 @@ fn place_case(db: &dyn HirDatabase, body: &MirBody, lvalue: &Place) -> Projectio /// Returns a map from basic blocks to the set of locals that might be ever initialized before /// the start of the block. Only `StorageDead` can remove something from this map, and we ignore /// `Uninit` and `drop` and similar after initialization. -fn ever_initialized_map(body: &MirBody) -> ArenaMap<BasicBlockId, ArenaMap<LocalId, bool>> { +fn ever_initialized_map( + db: &dyn HirDatabase, + body: &MirBody, +) -> ArenaMap<BasicBlockId, ArenaMap<LocalId, bool>> { let mut result: ArenaMap<BasicBlockId, ArenaMap<LocalId, bool>> = body.basic_blocks.iter().map(|x| (x.0, ArenaMap::default())).collect(); fn dfs( + db: &dyn HirDatabase, body: &MirBody, b: BasicBlockId, l: LocalId, @@ -267,7 +271,7 @@ fn ever_initialized_map(body: &MirBody) -> ArenaMap<BasicBlockId, ArenaMap<Local } } let Some(terminator) = &block.terminator else { - never!("Terminator should be none only in construction"); + never!("Terminator should be none only in construction.\nThe body:\n{}", body.pretty_print(db)); return; }; let targets = match &terminator.kind { @@ -299,18 +303,18 @@ fn ever_initialized_map(body: &MirBody) -> ArenaMap<BasicBlockId, ArenaMap<Local for target in targets { if !result[target].contains_idx(l) || !result[target][l] && is_ever_initialized { result[target].insert(l, is_ever_initialized); - dfs(body, target, l, result); + dfs(db, body, target, l, result); } } } for &l in &body.param_locals { result[body.start_block].insert(l, true); - dfs(body, body.start_block, l, &mut result); + dfs(db, body, body.start_block, l, &mut result); } for l in body.locals.iter().map(|x| x.0) { if !result[body.start_block].contains_idx(l) { result[body.start_block].insert(l, false); - dfs(body, body.start_block, l, &mut result); + dfs(db, body, body.start_block, l, &mut result); } } result @@ -326,7 +330,7 @@ fn mutability_of_locals( MutabilityReason::Mut { spans } => spans.push(span), x @ MutabilityReason::Not => *x = MutabilityReason::Mut { spans: vec![span] }, }; - let ever_init_maps = ever_initialized_map(body); + let ever_init_maps = ever_initialized_map(db, body); for (block_id, mut ever_init_map) in ever_init_maps.into_iter() { let block = &body.basic_blocks[block_id]; for statement in &block.statements { |