what's wrong with \partial

[Jinsong Zhao]

Hi there,

The following snippet can't give correct output. It produced the 
following warnings:

warning: barcheck failed at: -1/4
\partial2 d4
             |

\version "2.19.26"
\relative c' {
\clef "treble"
\key g \major
\tempo 4 = 100
\numericTimeSignature
\time 3/4

\partial2 d4 |
g4 g g |
}

If \partial2 was replaced with r2, there is no warnings. However, I 
don't want the rest sign at the beginning of this piece.

I appreciate you for any suggestions.

Best regards,
Jinsong