Details

This message is generated when formatting rules generate infinite recursion, or require recursion depth that exceeds the value of $RecursionLimit.
This error can normally be corrected through careful analysis of any formatting or typesetting rules that have been added.
Off[message] switches off the message; On[message] switches it on. For example: Off[Format::forml].

Examples

The right-hand side of this formatting rule involves an expression that matches the rule:

This shows a formatting rule that does not generate infinite recursion:

Remove the formatting rule for test:

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