unbounded chain in revised hash.refs macros, section 4.3

[nadeemabdulhamid]

In the error-handling version of hash.refs in 4.3, in:

; Check for no args at all
[(_)
 (raise-syntax-error #f "Expected hash.key0[.key1 ...] [default]" stx #'chain)]

the chain variable is not bound in the pattern for this case, so the whole sub-expr argument for raise-syntax-error should probably be omitted:

 (raise-syntax-error #f "Expected hash.key0[.key1 ...] [default]" stx)]

[greghendershott]

Good catch; thanks.