Don't report empty stacktraces

lib/sentry/event.ex

@@ -418,15 +418,10 @@ defmodule Sentry.Event do
 
   defp coerce_exception(exception, stacktrace_or_nil, _message, handled?)
        when is_exception(exception) do
-    stacktrace =
-      if is_list(stacktrace_or_nil) do
-        %Interfaces.Stacktrace{frames: stacktrace_to_frames(stacktrace_or_nil)}
-      end
-
     %Interfaces.Exception{
       type: inspect(exception.__struct__),
       value: Exception.message(exception),
-      stacktrace: stacktrace,
+      stacktrace: coerce_stacktrace(stacktrace_or_nil),
       mechanism: %Interfaces.Exception.Mechanism{handled: handled?}
     }
   end
@@ -441,7 +436,7 @@ defmodule Sentry.Event do
   defp add_thread_with_stacktrace(%__MODULE__{} = event, stacktrace) when is_list(stacktrace) do
     thread = %Interfaces.Thread{
       id: UUID.uuid4_hex(),
-      stacktrace: %Interfaces.Stacktrace{frames: stacktrace_to_frames(stacktrace)}
+      stacktrace: coerce_stacktrace(stacktrace)
     }
 
     %__MODULE__{event | threads: [thread]}
@@ -464,6 +459,17 @@ defmodule Sentry.Event do
     |> create_event()
   end
 
+  defp coerce_stacktrace(nil) do
+    nil
+  end
+
+  defp coerce_stacktrace(stacktrace) when is_list(stacktrace) do
+    case stacktrace_to_frames(stacktrace) do
+      [] -> nil
+      frames -> %Interfaces.Stacktrace{frames: frames}
+    end
+  end
+
   defp stacktrace_to_frames(stacktrace) when is_list(stacktrace) do
     in_app_module_allow_list = Config.in_app_module_allow_list()
 

test/logger_backend_test.exs

@@ -43,7 +43,7 @@ defmodule Sentry.LoggerBackendTest do
     assert event.message.formatted =~ ~s<** (stop) bad return value: "I am throwing"\n>
     assert event.message.formatted =~ ~s<Last message: {:"$gen_cast",>
     assert event.message.formatted =~ ~s<State: []>
-    assert thread.stacktrace.frames == []
+    assert thread.stacktrace == nil
   end
 
   test "abnormal GenServer exit is reported" do

test/sentry/logger_handler_test.exs

@@ -184,7 +184,8 @@ defmodule Sentry.LoggerHandlerTest do
 
       if System.otp_release() >= "26" do
         assert [] = event.exception
-        assert [_thread] = event.threads
+        assert [thread] = event.threads
+        assert thread.stacktrace == nil
         assert event.extra.genserver_state == ":no_state"
         assert event.extra.last_message =~ "{:run, #Function"
       end