From 52919c7f81dc868b7b6bfdc47ec7417d2fda2795 Mon Sep 17 00:00:00 2001
From: cyrgani <ansgar.w.zielke@gmail.com>
Date: Wed, 11 Feb 2026 21:39:22 +0000
Subject: [PATCH] allow `deprecated(since = "CURRENT_RUSTC_VERSION")`

---
 compiler/rustc_attr_parsing/src/attributes/deprecation.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/rustc_attr_parsing/src/attributes/deprecation.rs b/compiler/rustc_attr_parsing/src/attributes/deprecation.rs
index e01377d247bb..c055c2936e95 100644
--- a/compiler/rustc_attr_parsing/src/attributes/deprecation.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/deprecation.rs
@@ -1,4 +1,5 @@
 use rustc_hir::attrs::{DeprecatedSince, Deprecation};
+use rustc_hir::{RustcVersion, VERSION_PLACEHOLDER};
 
 use super::prelude::*;
 use super::util::parse_version;
@@ -143,6 +144,8 @@ fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser) -> Option<Attrib
                 DeprecatedSince::Future
             } else if !is_rustc {
                 DeprecatedSince::NonStandard(since)
+            } else if since.as_str() == VERSION_PLACEHOLDER {
+                DeprecatedSince::RustcVersion(RustcVersion::CURRENT)
             } else if let Some(version) = parse_version(since) {
                 DeprecatedSince::RustcVersion(version)
             } else {