fix

Author: phfaist

flm/__main__.py

@@ -63,7 +63,13 @@ def run_main(cmdargs=None, enable_debug_pdb=_default_enable_debug_pdb, exit_code
         if exit_code_on_error is not None:
             sys.exit(exit_code_on_error)
     except FLMMainRunError as e:
-        logging.getLogger('flm').critical('\n\n==> %s <==\n\n%s', e.message(), e.details())
+        message = e.message()
+        details = e.details()
+        logging.getLogger('flm').critical(
+            '\n\n==> %s <==%s',
+            message,
+            '\n\n'+details if details else ''
+        )
         if exit_code_on_error is not None:
             sys.exit(exit_code_on_error)
     except Exception as e:

flm/main/run.py

@@ -45,7 +45,7 @@ class FLMMainRunError(Exception):
     def __init__(self, message, details=None):
         super().__init__(message)
         self._message = message.strip()
-        self._details = details.strip()
+        self._details = details.strip() if details else None
 
     def message(self):
         return self._message