From 37260e1c5b920baf12ec0dd6755751d1783e27ed Mon Sep 17 00:00:00 2001
From: Michael Goulet <michael@errs.io>
Date: Tue, 20 May 2025 10:22:08 +0000
Subject: [PATCH] Allow trailing comma after argument in query definition

---
 compiler/rustc_macros/src/query.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler/rustc_macros/src/query.rs b/compiler/rustc_macros/src/query.rs
index ee377277017a5..2196f71299a53 100644
--- a/compiler/rustc_macros/src/query.rs
+++ b/compiler/rustc_macros/src/query.rs
@@ -51,6 +51,7 @@ impl Parse for Query {
         let key = Pat::parse_single(&arg_content)?;
         arg_content.parse::<Token![:]>()?;
         let arg = arg_content.parse()?;
+        let _ = arg_content.parse::<Option<Token![,]>>()?;
         let result = input.parse()?;
 
         // Parse the query modifiers