bjoernager/rust
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Use invalid local id for zeroth node parent.

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This commit is contained in:
Camille GILLOT 2021-10-12 08:34:38 +02:00
parent 6b7995195a
commit c5628a5e65
3 changed files with 11 additions and 2 deletions
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5
compiler/rustc_ast_lowering/src/index.rs
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@ -47,7 +47,10 @@ pub(super) fn index_hir<'hir>(
bodies: &IndexVec<ItemLocalId, Option<&'hir Body<'hir>>>,
) -> (IndexVec<ItemLocalId, Option<ParentedNode<'hir>>>, FxHashMap<LocalDefId, ItemLocalId>) {
let mut nodes = IndexVec::new();
nodes.push(Some(ParentedNode { parent: ItemLocalId::new(0), node: item.into() }));
// This node's parent should never be accessed: the owner's parent is computed by the
// hir_owner_parent query. Make it invalid (= ItemLocalId::MAX) to force an ICE whenever it is
// used.
nodes.push(Some(ParentedNode { parent: ItemLocalId::INVALID, node: item.into() }));
let mut collector = NodeCollector {
source_map: sess.source_map(),
definitions,