Rollup merge of #124917 - cardigan1008:issue-124819, r=pnkfelix

Check whether the next_node is else-less if in get_return_block

Fix #124819

compiler/rustc_middle/src/hir/map/mod.rs

@@ -549,6 +549,7 @@ impl<'hir> Map<'hir> {
                     Node::Block(Block { expr: None, .. }) => return None,
                     // The current node is not the tail expression of its parent.
                     Node::Block(Block { expr: Some(e), .. }) if hir_id != e.hir_id => return None,
+                    Node::Block(Block { expr: Some(e), ..}) if matches!(e.kind, ExprKind::If(_, _, None)) => return None,
                     _ => {}
                 }
             }