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Steps to Reproduce:

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rule "Test" when Bean( $f : field ) then System.out.println( $f ); end
Assuming field is null, (ii) the engine is in EQUALITY mode

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rule "Test" when Bean( $f : field ) then System.out.println( $f ); end Assuming field is null, (ii) the engine is in EQUALITY mode
Workaround:

Workaround Exists
Workaround Description:

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Bind a variable to the field's containing object and use the appropriate getter

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Bind a variable to the field's containing object and use the appropriate getter

When the engine is in EQUALITY mode and a var is bound to a null expression (e.g. a field), using that var in the RHS will generate a NPE

In EQUALITY mode, using a variable bound to a null expression in the RHS generates a NPE