Revert "Fix error in serializing to FuzzTaskCrash". Commit was pushed…

… accidentally. (#4084)

This reverts commit 53384c4.

src/clusterfuzz/_internal/bot/tasks/utasks/fuzz_task.py

@@ -302,22 +302,10 @@ def to_proto(self):
     crash.security_flag = self.security_flag
     crash.key = self.key
     crash.should_be_ignored = self.should_be_ignored
-    crash_frames = _filter_crash_frames_for_proto(self.crash_frames)
-    crash.crash_frames.extend(crash_frames)
+    crash.crash_frames.extend(self.crash_frames)
     return crash
 
 
-def _filter_crash_frames_for_proto(crash_frames):
-  filtered_frames = []
-  for frame in crash_frames:
-    if frame is None:
-      continue
-    if not isinstance(frame, str):
-      logs.error(f'{frame} is of type: {type(frame)}')
-    filtered_frames.append(frame)
-  return filtered_frames
-
-
 def find_main_crash(crashes: List[Crash], full_fuzzer_name: str,
                     test_timeout: int, upload_urls: UploadUrlCollection):
   """Find the first reproducible crash or the first valid crash. And return the

src/clusterfuzz/stacktraces/__init__.py

@@ -1287,7 +1287,7 @@ def parse(self, stacktrace: str) -> CrashInfo:
         # Update address from the first stack frame unless we already have
         # more detailed information from KASan.
         if state.frame_count == 1 and not state.is_kasan:
-          state.crash_address = f'0x{android_kernel_match.group(1)}'
+          state.crash_address = '0x%s' % android_kernel_match.group(1)
         continue
 
       # Android kernel stack frame without address