fixup! refactor(hydroflow_lang): require lifetime on perist*() oper…

…ators

hydroflow/src/scheduled/graph.rs

@@ -168,7 +168,11 @@ impl<'a> Hydroflow<'a> {
 
         let mut op_inst_diagnostics = Vec::new();
         meta_graph.insert_node_op_insts_all(&mut op_inst_diagnostics);
-        assert!(op_inst_diagnostics.is_empty());
+        assert!(
+            op_inst_diagnostics.is_empty(),
+            "Expected no diagnostics, got: {:#?}",
+            op_inst_diagnostics
+        );
 
         assert!(self.meta_graph.replace(meta_graph).is_none());
     }

hydroflow/tests/compile-fail/surface_singleton_badexpr.stderr

@@ -1,10 +1,5 @@
-error[E0308]: mismatched types
- --> tests/compile-fail/surface_singleton_badexpr.rs:7:40
-  |
-7 |             -> filter(|value| value <= #my_ref)
-  |                                        ^^^^^^^ expected `&u32`, found integer
-  |
-help: consider removing deref here
-  |
-7 |             -> filter(|value| value <= #my_ref)
+error: `persist` should have exactly 1 persistence lifetime arguments, actually has 0.
+ --> tests/compile-fail/surface_singleton_badexpr.rs:6:16
   |
+6 |             -> persist()
+  |                ^^^^^^^

hydroflow_lang/src/graph/flat_graph_builder.rs

@@ -940,7 +940,7 @@ impl FlatGraphBuilder {
 
                 self.flat_graph.insert_intermediate_node(
                     pred_edge,
-                    GraphNode::Operator(parse_quote_spanned! {op_span=> persist() }),
+                    GraphNode::Operator(parse_quote_spanned! {op_span=> persist::<'static>() }), // TODO(mingwei): use 'tick when implemented.
                 );
                 self.diagnostics.push(Diagnostic::spanned(
                     op_span,