fix: String keys (#90)

* fix: Coerce variable names to strings

This already works fine right now because the JSON encoder coerces
dictionary keys to strings, but we shouldn't rely on this behavior.

* test: Assert that all keys are strings in event

* fix: Bad assertion for empty dicts

* fix: Allow all string types

* fix: Linters

Author: untitaker

sentry_sdk/utils.py

@@ -297,7 +297,7 @@ def _walk(obj, depth):
 def extract_locals(frame):
     rv = {}
     for key, value in frame.f_locals.items():
-        rv[key] = object_to_json(value)
+        rv[str(key)] = object_to_json(value)
     return rv
 
 

tests/conftest.py

@@ -5,7 +5,7 @@
 import pytest
 
 import sentry_sdk
-from sentry_sdk._compat import reraise
+from sentry_sdk._compat import reraise, string_types
 from sentry_sdk.transport import Transport
 
 SEMAPHORE = "./semaphore"
@@ -31,10 +31,18 @@ def _capture_internal_exception(exc_info):
 
 @pytest.fixture
 def monkeypatch_test_transport(monkeypatch, assert_semaphore_acceptance):
+    def check_event(event):
+        def check_string_keys(map):
+            for key, value in map.items():
+                assert isinstance(key, string_types)
+                if isinstance(value, dict):
+                    check_string_keys(value)
+
+        check_string_keys(event)
+        assert_semaphore_acceptance(event)
+
     def inner(client):
-        monkeypatch.setattr(
-            client, "transport", TestTransport(assert_semaphore_acceptance)
-        )
+        monkeypatch.setattr(client, "transport", TestTransport(check_event))
 
     return inner
 
@@ -61,10 +69,9 @@ def inner(obj):
 
 @pytest.fixture
 def assert_semaphore_acceptance(tmpdir):
-    if not SEMAPHORE:
-        return lambda event: None
-
     def inner(event):
+        if not SEMAPHORE:
+            return
         # not dealing with the subprocess API right now
         file = tmpdir.join("event")
         file.write(json.dumps(dict(event)))
@@ -79,7 +86,7 @@ def inner(event):
 
 
 @pytest.fixture
-def sentry_init(monkeypatch_test_transport, assert_semaphore_acceptance):
+def sentry_init(monkeypatch_test_transport):
     def inner(*a, **kw):
         sentry_sdk.api._init_on_current(*a, **kw)
         monkeypatch_test_transport(sentry_sdk.Hub.current.client)

tests/test_utils.py

@@ -40,3 +40,19 @@ def test_abs_path():
     for frame in frames:
         assert os.path.abspath(frame["abs_path"]) == frame["abs_path"]
         assert os.path.basename(frame["filename"]) == frame["filename"]
+
+
+def test_non_string_variables():
+    """There is some extremely terrible code in the wild that
+    inserts non-strings as variable names into `locals()`."""
+
+    try:
+        locals()[42] = True
+        1 / 0
+    except ZeroDivisionError:
+        exceptions = exceptions_from_error_tuple(sys.exc_info())
+
+    exception, = exceptions
+    assert exception["type"] == "ZeroDivisionError"
+    frame, = exception["stacktrace"]["frames"]
+    assert frame["vars"]["42"] == "True"