Ignore any error containing {expr}. A normal message is given instead. This is only meant to be used in tests, where catching the error with try/catch cannot be used (because it skips over following code). {expr} is used literally, not as a pattern. When the {expr} is the string "RESET" then the list of ignored errors is made empty. Can also be used as a |method|: GetErrorText()->test_ignore_error()