From 94639f6b7182c2e1a82f2f907b03b5b15202acfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C3=A9n=C3=A9dikt=20Tran?=
 <10796600+picnixz@users.noreply.github.com>
Date: Thu, 31 Oct 2024 15:24:07 +0100
Subject: [PATCH] gh-126240: handle `NULL` returned by  `_Py_asdl_expr_seq_new`
 (#126241)

check return value of `_Py_asdl_expr_seq_new`
---
 Parser/action_helpers.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Parser/action_helpers.c b/Parser/action_helpers.c
index cb21777f566..5ac1dd78136 100644
--- a/Parser/action_helpers.c
+++ b/Parser/action_helpers.c
@@ -1128,6 +1128,9 @@ expr_ty _PyPegen_collect_call_seqs(Parser *p, asdl_expr_seq *a, asdl_seq *b,
     }
 
     asdl_expr_seq *args = _Py_asdl_expr_seq_new(total_len, arena);
+    if (args == NULL) {
+        return NULL;
+    }
 
     Py_ssize_t i = 0;
     for (i = 0; i < args_len; i++) {
@@ -1298,6 +1301,9 @@ unpack_top_level_joined_strs(Parser *p, asdl_expr_seq *raw_expressions)
     }
 
     asdl_expr_seq *expressions = _Py_asdl_expr_seq_new(req_size, p->arena);
+    if (expressions == NULL) {
+        return NULL;
+    }
 
     Py_ssize_t raw_index, req_index = 0;
     for (raw_index = 0; raw_index < raw_size; raw_index++) {
@@ -1490,6 +1496,9 @@ expr_ty _PyPegen_formatted_value(Parser *p, expr_ty expression, Token *debug, Re
         }
 
         asdl_expr_seq *values = _Py_asdl_expr_seq_new(2, arena);
+        if (values == NULL) {
+            return NULL;
+        }
         asdl_seq_SET(values, 0, debug_text);
         asdl_seq_SET(values, 1, formatted_value);
         return _PyAST_JoinedStr(values, lineno, col_offset, debug_end_line, debug_end_offset, p->arena);