When catching non-jinja errors from Jinja, raise a good error message, and make a best effort at tracking down the line number and error line if possible.

spiffworkflow-backend/src/spiffworkflow_backend/routes/tasks_controller.py

@@ -2,6 +2,7 @@
 import json
 import os
 import uuid
+from sys import exc_info
 from typing import Any
 from typing import Dict
 from typing import Optional
@@ -562,6 +563,20 @@ def _render_jinja_template(unprocessed_template: str, spiff_task: SpiffTask) ->
             "Jinja2 template errors can happen when trying to displaying task data"
         )
         raise wfe from template_error
+    except Exception as error:
+        type, value, tb = exc_info()
+        wfe = WorkflowTaskException(
+            str(error), task=spiff_task, exception=error
+        )
+        while tb:
+            if tb.tb_frame.f_code.co_filename == '<template>':
+                wfe.line_number = tb.tb_lineno
+                wfe.error_line = unprocessed_template.split("\n")[tb.tb_lineno - 1]
+            tb = tb.tb_next
+        wfe.add_note(
+            "Jinja2 template errors can happen when trying to displaying task data"
+        )
+        raise wfe from error
 
 
 def _get_spiff_task_from_process_instance(