From 4c4091f89dac1efcb9edc40ac80d1e46b2306244 Mon Sep 17 00:00:00 2001
From: "sentry[bot]" <39604003+sentry[bot]@users.noreply.github.com>
Date: Sat, 5 Sep 2026 22:45:27 +0000
Subject: [PATCH 1/2] fix(redis): Support list types in RedisBuffer
 serialization

---
 src/sentry/buffer/redis.py        |  9 +++++++--
 tests/sentry/buffer/test_redis.py | 12 ++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/sentry/buffer/redis.py b/src/sentry/buffer/redis.py
index 4e50145bee20..3fa36fcc87e1 100644
--- a/src/sentry/buffer/redis.py
+++ b/src/sentry/buffer/redis.py
@@ -272,7 +272,7 @@ def _dump_values(cls, values: dict[Any, Any]) -> dict[Any, tuple[str, str]]:
     @classmethod
     def _dump_value(
         cls,
-        value: str | datetime | date | int | float | dict[str, Any] | None,
+        value: str | datetime | date | int | float | dict[str, Any] | list[Any] | None,
         depth: int = 0,
     ) -> tuple[str, str]:
         if depth > 3:
@@ -297,6 +297,9 @@ def _dump_value(
         elif isinstance(value, dict):
             type_ = "di"
             value = json.dumps({k: cls._dump_value(v, depth + 1) for k, v in value.items()})
+        elif isinstance(value, list):
+            type_ = "l"
+            value = json.dumps([cls._dump_value(item, depth + 1) for item in value])
         else:
             raise TypeError(type(value))
         return type_, str(value)
@@ -313,7 +316,7 @@ def _load_values(
     @classmethod
     def _load_value(
         cls, payload: tuple[str, Any]
-    ) -> dict[str, Any] | str | datetime | date | int | float | None:
+    ) -> dict[str, Any] | list[Any] | str | datetime | date | int | float | None:
         (type_, value) = payload
         if type_ == "n":
             return None
@@ -332,6 +335,8 @@ def _load_value(
         elif type_ == "di":
             value = json.loads(value)
             return {k: cls._load_value(v) for k, v in value.items()}
+        elif type_ == "l":
+            return [cls._load_value(item) for item in json.loads(value)]
         else:
             raise TypeError(f"invalid type: {type_}")
 
diff --git a/tests/sentry/buffer/test_redis.py b/tests/sentry/buffer/test_redis.py
index 973b344220e8..4222fc51bf3e 100644
--- a/tests/sentry/buffer/test_redis.py
+++ b/tests/sentry/buffer/test_redis.py
@@ -268,6 +268,18 @@ def test_incr_uses_signal_only(self, default_group, task_runner) -> None:
         (3.14, "float"),
         ({"a": {"i": 0}, "b": {"s": ""}}, "dict"),
         (False, "bool"),
+        ([1, "a", 3.14], "list"),
+        (
+            [
+                {
+                    "parent_group_id": 4889213441,
+                    "should_group": True,
+                    "stacktrace_distance": 0.009,
+                    "message_distance": 0.0,
+                }
+            ],
+            "list_of_dicts",
+        ),
     ],
     ids=lambda input: input[1],
 )

From e1bd97837749c7cdbb2cff86f8e0605c8ae678c2 Mon Sep 17 00:00:00 2001
From: "sentry[bot]" <39604003+sentry[bot]@users.noreply.github.com>
Date: Sat, 5 Sep 2026 23:00:08 +0000
Subject: [PATCH 2/2] fix(redis): Support list types in RedisBuffer
 serialization

---
 src/sentry/buffer/redis.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sentry/buffer/redis.py b/src/sentry/buffer/redis.py
index 3fa36fcc87e1..d84790139eef 100644
--- a/src/sentry/buffer/redis.py
+++ b/src/sentry/buffer/redis.py
@@ -307,7 +307,7 @@ def _dump_value(
     @classmethod
     def _load_values(
         cls, payload: dict[str, tuple[str, Any]]
-    ) -> dict[str, str | datetime | date | int | float | dict[str, Any] | None]:
+    ) -> dict[str, str | datetime | date | int | float | dict[str, Any] | list[Any] | None]:
         result = {}
         for k, (t, v) in payload.items():
             result[k] = cls._load_value((t, v))