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Panic on relowering an AST node with a cached node id

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This commit is contained in:
Jeffrey Seyfried 2016-04-30 04:08:49 +00:00
parent 8b1dcf40f2
commit 0649942a46
1 changed files with 3 additions and 0 deletions
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3
src/librustc/hir/lowering.rs
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@ -213,6 +213,8 @@ fn cache_ids<'a, OP, R>(lctx: &LoweringContext, expr_id: NodeId, op: OP) -> R
let id_cache: &mut HashMap<_, _> = &mut lctx.id_cache.borrow_mut();
if id_cache.contains_key(&expr_id) {
panic!("relowering!!!");
/*
let cached_id = lctx.cached_id.get();
if cached_id == 0 {
// We're entering a node where we need to track ids, but are not
@ -224,6 +226,7 @@ fn cache_ids<'a, OP, R>(lctx: &LoweringContext, expr_id: NodeId, op: OP) -> R
assert!(cached_id == id_cache[&expr_id], "id mismatch");
}
lctx.gensym_key.set(id_cache[&expr_id]);
*/
} else {
// We've never lowered this node before, remember it for next time.
let next_id = lctx.id_assigner.peek_node_id();