lock() on a code ref?

["Jerry D. Hedden" <jdhedden@cpan.org>]

The following comes from pp.c:

PP(pp_lock)
{
    dVAR;
    dSP;
    dTOPss;
    SV *retsv = sv;
    SvLOCK(sv);
    if (SvTYPE(retsv) == SVt_PVAV || SvTYPE(retsv) == SVt_PVHV
	|| SvTYPE(retsv) == SVt_PVCV) {
	retsv = refto(retsv);
    }
    SETs(retsv);
    RETURN;
}

Why is there a check for a code ref in the 'if' statement?
SvTYPE(retsv) == SVt_PVCV
This 'if' was added with change 170.  Was it just notional?
Since you can't lock code refs, I think this check should be removed.
Right?

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Follow-Ups from:

Dave Mitchell <davem@iabyn.com>

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