Returns an error when an assertion has failed.
This function does not generate a change.
assert_err([message])
| Argument | Type | Description |
|---|---|---|
| message | str (optional) | Alternative error message. |
An error value (in a client response, an error value will be packed as a string value with the error message).
This code shows assert_err():
assert_err();
Return value in JSON format
"assertion statement has failed"