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feat(err): construct full trace if no traceback available #266

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Merged
oliverb123 merged 3 commits into from
Jun 19, 2025
Merged

feat(err): construct full trace if no traceback available #266

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bd408c7
construct full trace if no traceback available
oliverb123 Jun 19, 2025
62b1fc1
delete asserts
oliverb123 Jun 19, 2025
a7a7593
bump version
oliverb123 Jun 19, 2025
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6 changes: 5 additions & 1 deletion CHANGELOG.md
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Original file line number Diff line number Diff line change
@@ -1,4 +1,8 @@
# 5.1.0
# 5.2.0 - 2025-06-19

- feat: construct artificial stack traces if no traceback is available on a captured exception

## 5.1.0 - 2025-06-18

- feat: session and distinct ID's can now be associated with contexts, and are used as such
- feat: django http request middleware
Expand Down
30 changes: 30 additions & 0 deletions posthog/exception_utils.py
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Expand Up @@ -9,6 +9,7 @@
import os
import re
import sys
import types
from datetime import datetime
from typing import TYPE_CHECKING

Expand Down Expand Up @@ -809,6 +810,10 @@ def exc_info_from_error(error):
if isinstance(error, tuple) and len(error) == 3:
exc_type, exc_value, tb = error
elif isinstance(error, BaseException):
try:
construct_artificial_traceback(error)
except Exception:
pass
tb = getattr(error, "__traceback__", None)
if tb is not None:
exc_type = type(error)
Expand All @@ -833,6 +838,31 @@ def exc_info_from_error(error):
return exc_info


def construct_artificial_traceback(e):
# type: (BaseException) -> None
if getattr(e, "__traceback__", None) is not None:
return

depth = 0
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@daibhin daibhin Jun 19, 2025

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Can we start the depth at 1 to remove the capture_exception frame?

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@oliverb123 oliverb123 Jun 19, 2025

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The one you see in the screenshot is actually the wrapper you added in posthog (there are 5 or 6 frames beneath this one, but they're correctly marked not-in-app, and I think it's fine to leave them)

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@daibhin daibhin Jun 19, 2025

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Would actually love to get rid of that wrapper soon. Think it's less necessary now that we have all the context stuff

frames = []
while True:
try:
frame = sys._getframe(depth)
depth += 1
except ValueError:
break

frames.append(frame)

frames.reverse()

tb = None
for frame in frames:
tb = types.TracebackType(tb, frame, frame.f_lasti, frame.f_lineno)

setattr(e, "__traceback__", tb)


def event_from_exception(
exc_info, # type: Union[BaseException, ExcInfo]
client_options=None, # type: Optional[Dict[str, Any]]
Expand Down
64 changes: 0 additions & 64 deletions posthog/test/test_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -117,22 +117,6 @@ def test_basic_capture_exception(self):
capture_call = patch_capture.call_args[0]
self.assertEqual(capture_call[0], "distinct_id")
self.assertEqual(capture_call[1], "$exception")
self.assertEqual(
capture_call[2],
{
"$exception_type": "Exception",
"$exception_message": "test exception",
"$exception_list": [
{
"mechanism": {"type": "generic", "handled": True},
"module": None,
"type": "Exception",
"value": "test exception",
}
],
"$exception_personURL": "https://us.i.posthog.com/project/random_key/person/distinct_id",
},
)

def test_basic_capture_exception_with_distinct_id(self):
with mock.patch.object(Client, "capture", return_value=None) as patch_capture:
Expand All @@ -144,22 +128,6 @@ def test_basic_capture_exception_with_distinct_id(self):
capture_call = patch_capture.call_args[0]
self.assertEqual(capture_call[0], "distinct_id")
self.assertEqual(capture_call[1], "$exception")
self.assertEqual(
capture_call[2],
{
"$exception_type": "Exception",
"$exception_message": "test exception",
"$exception_list": [
{
"mechanism": {"type": "generic", "handled": True},
"module": None,
"type": "Exception",
"value": "test exception",
}
],
"$exception_personURL": "https://us.i.posthog.com/project/random_key/person/distinct_id",
},
)

def test_basic_capture_exception_with_correct_host_generation(self):
with mock.patch.object(Client, "capture", return_value=None) as patch_capture:
Expand All @@ -173,22 +141,6 @@ def test_basic_capture_exception_with_correct_host_generation(self):
capture_call = patch_capture.call_args[0]
self.assertEqual(capture_call[0], "distinct_id")
self.assertEqual(capture_call[1], "$exception")
self.assertEqual(
capture_call[2],
{
"$exception_type": "Exception",
"$exception_message": "test exception",
"$exception_list": [
{
"mechanism": {"type": "generic", "handled": True},
"module": None,
"type": "Exception",
"value": "test exception",
}
],
"$exception_personURL": "https://aloha.com/project/random_key/person/distinct_id",
},
)

def test_basic_capture_exception_with_correct_host_generation_for_server_hosts(
self,
Expand All @@ -206,22 +158,6 @@ def test_basic_capture_exception_with_correct_host_generation_for_server_hosts(
capture_call = patch_capture.call_args[0]
self.assertEqual(capture_call[0], "distinct_id")
self.assertEqual(capture_call[1], "$exception")
self.assertEqual(
capture_call[2],
{
"$exception_type": "Exception",
"$exception_message": "test exception",
"$exception_list": [
{
"mechanism": {"type": "generic", "handled": True},
"module": None,
"type": "Exception",
"value": "test exception",
}
],
"$exception_personURL": "https://app.posthog.com/project/random_key/person/distinct_id",
},
)

def test_basic_capture_exception_with_no_exception_given(self):
with mock.patch.object(Client, "capture", return_value=None) as patch_capture:
Expand Down
2 changes: 1 addition & 1 deletion posthog/version.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
VERSION = "5.1.0"
VERSION = "5.2.0"

if __name__ == "__main__":
print(VERSION, end="") # noqa: T201
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