Are you submitting a bug report or a feature request?
Bug report (minor update of a peer dependency, react-final-form (6.4.0 -> 6.5.0), causes breaking change).
What is the current behavior?
When using an <OnChange> component without name attribute specified, it used to pass a whole values object to the children callback as an argument. But with a recent update of react-final-form from 6.4.0 to 6.5.0, the error started appearing:
prop name cannot be undefined in <Field> component
What is the expected behavior?
The callback passed a whole object of values if no field name specified to listen to in <OnChange> component. See the screenshot with desired behavior below.

Sandbox Link
Sandbox with desired behavior (notice an outdated react-final-form version, 6.4.0). Try typing in fields and see the console output.
https://codesandbox.io/s/affectionate-raman-r7qm4?file=/src/App.js&expanddevtools=1
Try changing the version to the latest, and error starts appearing.
Are you submitting a bug report or a feature request?
Bug report (minor update of a peer dependency, react-final-form (6.4.0 -> 6.5.0), causes breaking change).
What is the current behavior?
When using an
<OnChange>component withoutnameattribute specified, it used to pass a whole values object to thechildrencallback as an argument. But with a recent update ofreact-final-formfrom 6.4.0 to 6.5.0, the error started appearing:What is the expected behavior?
The callback passed a whole object of values if no field name specified to listen to in
<OnChange>component. See the screenshot with desired behavior below.Sandbox Link
Sandbox with desired behavior (notice an outdated
react-final-formversion, 6.4.0). Try typing in fields and see the console output.https://codesandbox.io/s/affectionate-raman-r7qm4?file=/src/App.js&expanddevtools=1
Try changing the version to the latest, and error starts appearing.