fix(sessions): Only crash session if the error is unhandled, not if it is fatal (#754)

Exceptions that are fatal but handled are probably log messages. Log messages are not really crashes. If we capture crashes as log messages only, we should fix that first by writing more integrations or fixing bugs in existing ones.

Author: untitaker

sentry_sdk/client.py

@@ -267,20 +267,14 @@ def _update_session_from_event(
         errored = False
         user_agent = None
 
-        # Figure out if this counts as an error and if we should mark the
-        # session as crashed.
-        level = event.get("level")
-        if level == "fatal":
-            crashed = True
-        if not crashed:
-            exceptions = (event.get("exception") or {}).get("values")
-            if exceptions:
-                errored = True
-                for error in exceptions:
-                    mechanism = error.get("mechanism")
-                    if mechanism and mechanism.get("handled") is False:
-                        crashed = True
-                        break
+        exceptions = (event.get("exception") or {}).get("values")
+        if exceptions:
+            errored = True
+            for error in exceptions:
+                mechanism = error.get("mechanism")
+                if mechanism and mechanism.get("handled") is False:
+                    crashed = True
+                    break
 
         user = event.get("user")