diff options
| -rw-r--r-- | src/librustc/hir/map/mod.rs | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/librustc/hir/map/mod.rs b/src/librustc/hir/map/mod.rs index 3fdd9c34f46..45b1d6c1841 100644 --- a/src/librustc/hir/map/mod.rs +++ b/src/librustc/hir/map/mod.rs @@ -553,7 +553,9 @@ impl<'hir> Map<'hir> { } /// Similar to get_parent, returns the parent node id or id if there is no - /// parent. + /// parent. Note that the parent may be CRATE_NODE_ID, which is not itself + /// present in the map -- so passing the return value of get_parent_node to + /// get may actually panic. /// This function returns the immediate parent in the AST, whereas get_parent /// returns the enclosing item. Note that this might not be the actual parent /// node in the AST - some kinds of nodes are not in the map and these will @@ -629,7 +631,7 @@ impl<'hir> Map<'hir> { } /// Retrieve the NodeId for `id`'s enclosing method, unless there's a - /// `while` or `loop` before reacing it, as block tail returns are not + /// `while` or `loop` before reaching it, as block tail returns are not /// available in them. /// /// ``` |