[Autocomplete] Uncaught TypeError: Cannot read property 'length' of null

TypeError · Uncaught TypeError: Cannot read property ‘length’ of null

https://github.com/mui-org/material-ui/blob/701e3ad76b788a50ea83aeb8516ed303c2435bd0/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js#L821

If value is null and multiple is true, we run into this error. Should add a check for value being null.

Version: "@material-ui/lab": "^4.0.0-alpha.45"

[ohlr]

@eps1lon This should be a sufficient test case

        <Autocomplete
            options={options}
            getOptionLabel={option => option.label}
            value={null}
            onChange={(event: any, newValue: any) => {
                handleOptionsIdChange(newValue);
            }}
            multiple={true}
            renderInput={params => (
                <TextField {...params} label="test" variant="standard" fullWidth />
            )}
        />

[oliviertassinari]

@parksj10 you can provide an empty array instead.