fix: add missing explicit lifetime for rust 1.83 build

Signed-off-by: Rui Chen <rui@chenrui.dev>

Author: chenrui333

libflux/flux-core/src/ast/walk/mod.rs

@@ -180,7 +180,7 @@ impl<'a> Node<'a> {
 
 impl<'a> Node<'a> {
     #[allow(missing_docs)]
-    pub fn from_expr(expr: &'a Expression) -> Node {
+    pub fn from_expr(expr: &'a Expression) -> Node<'a> {
         match expr {
             Expression::Identifier(e) => Node::Identifier(e),
             Expression::Array(e) => Node::ArrayExpr(e),

libflux/flux-core/src/parser/mod.rs

@@ -41,7 +41,7 @@ pub struct Parser<'input> {
 
 impl<'input> Parser<'input> {
     /// Instantiates a new parser with the given string as input.
-    pub fn new(src: &'input str) -> Parser {
+    pub fn new(src: &'input str) -> Parser<'input> {
         let s = Scanner::new(src);
         Parser {
             s,