Exception message in subprocess doesn't say which property in the subprocess was affected

The destination property is added to the exception message in import():

        catch (MigrateException $e) {
          $this->getIdMap()->saveIdMapping($row, [], $e->getStatus());
          $msg = sprintf("%s:%s:%s", $this->migration->getPluginId(), $destination_property_name, $e->getMessage());
          $this->saveMessage($msg, $e->getLevel());
          $save = FALSE;
        }

But SubProcess calls processRow().

I *think* we can fix this by adding the same handling in processRow() -- that is not called by the main import process AFAICT.

Thanks for reporting! Could we get a test case showing the issue or something testing the new exception.

I'm adding tests here: 📌 Add kernel tests for prefixing of migrate process errors Needs review .

🐛 Migrate exception message should give the index of the process plugin in the pipeline Active adds indexes to subprocess pipeline exception messages to indicate which plugin had the problem. Is this a duplicate of that issue?