From cbd51ebeef7471fb1fd5292db1670276f5eedd6e Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Tue, 27 Jan 2026 19:03:39 +0800
Subject: [PATCH 1/3] warning when await an unawaitable constant

---
 Python/codegen.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/Python/codegen.c b/Python/codegen.c
index 478fbec1cbadd0..0394264da75659 100644
--- a/Python/codegen.c
+++ b/Python/codegen.c
@@ -3748,6 +3748,32 @@ check_index(compiler *c, expr_ty e, expr_ty s)
     }
 }
 
+check_awaitable(compiler* c, expr_ty e)
+{
+    /* Emit a warning when awaiting obvious non-awaitable literal objects. */
+    switch (e->kind) {
+    case Constant_kind:
+    case Tuple_kind:
+    case List_kind:
+    case ListComp_kind:
+    case Dict_kind:
+    case DictComp_kind:
+    case Set_kind:
+    case SetComp_kind:
+    case GeneratorExp_kind:
+    case JoinedStr_kind:
+    case TemplateStr_kind:
+    case FormattedValue_kind:
+    case Interpolation_kind: {
+        location loc = LOC(e);
+        return _PyCompile_Warn(c, loc, "'%.200s' object can't be awaited",
+            infer_type(e)->tp_name);
+    }
+    default:
+        return SUCCESS;
+    }
+}
+
 static int
 is_import_originated(compiler *c, expr_ty e)
 {
@@ -5295,6 +5321,7 @@ codegen_visit_expr(compiler *c, expr_ty e)
         ADD_YIELD_FROM(c, loc, 0);
         break;
     case Await_kind:
+        RETURN_IF_ERROR(check_awaitable(c, e->v.Await.value));
         VISIT(c, expr, e->v.Await.value);
         ADDOP_I(c, loc, GET_AWAITABLE, 0);
         ADDOP_LOAD_CONST(c, loc, Py_None);

From 8b360469eea11fe47f1234f5a8a6a53cfeb767ac Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Tue, 27 Jan 2026 19:06:21 +0800
Subject: [PATCH 2/3] add new

---
 .../2026-01-27-19-06-08.gh-issue-144261.iQANFZ.rst               | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2026-01-27-19-06-08.gh-issue-144261.iQANFZ.rst

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-01-27-19-06-08.gh-issue-144261.iQANFZ.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-01-27-19-06-08.gh-issue-144261.iQANFZ.rst
new file mode 100644
index 00000000000000..3482abfd59d311
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-01-27-19-06-08.gh-issue-144261.iQANFZ.rst
@@ -0,0 +1 @@
+SyntaxWarning when await an unawaitable constant.

From c0ade96a91ab0887ffe926c63adcf298d8cdf19f Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Tue, 27 Jan 2026 19:18:38 +0800
Subject: [PATCH 3/3] add missing type

---
 Python/codegen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Python/codegen.c b/Python/codegen.c
index 0394264da75659..9dd081a60fc5f8 100644
--- a/Python/codegen.c
+++ b/Python/codegen.c
@@ -3748,6 +3748,7 @@ check_index(compiler *c, expr_ty e, expr_ty s)
     }
 }
 
+static int
 check_awaitable(compiler* c, expr_ty e)
 {
     /* Emit a warning when awaiting obvious non-awaitable literal objects. */