Also show error message if connection got reset without error code

When working with --external-backend, the engine just stops responding, and the operating system cleans up its socket connection. From Cura's front-end we then just see the socket reset. So we should interpret a reset socket to mean that the slicing process was halted.
When not working with an external backend, a crash would always give a response code and we can base it on that instead (as previously implemented).

Contributes to issue CURA-6568.

1 files changed, 6 insertions, 1 deletions

diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index fa9a8c5474..272ad3a7e9 100755
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -610,10 +610,15 @@ class CuraEngineBackend(QObject, Backend):
 
         if error.getErrorCode() not in [Arcus.ErrorCode.BindFailedError, Arcus.ErrorCode.ConnectionResetError, Arcus.ErrorCode.Debug]:
             Logger.log("w", "A socket error caused the connection to be reset")
+        elif error.getErrorCode() == Arcus.ErrorCode.ConnectionResetError:
+            Logger.error("CuraEngine crashed abnormally! The socket connection was reset unexpectedly.")
+            self._slicing_error_message.show()
+            self.setState(BackendState.Error)
+            self.stopSlicing()
 
         # _terminate()' function sets the job status to 'cancel', after reconnecting to another Port the job status
         # needs to be updated. Otherwise backendState is "Unable To Slice"
-        if error.getErrorCode() == Arcus.ErrorCode.BindFailedError and self._start_slice_job is not None:
+        elif error.getErrorCode() == Arcus.ErrorCode.BindFailedError and self._start_slice_job is not None:
             self._start_slice_job.setIsCancelled(False)
 
     # Check if there's any slicable object in the scene.