JSON.parse error for git log format

[sangheestyle]

$ node searchCommits.js 
undefined:1
: "Sun Mar 24 20:32:24 2013 +0100", "subject": "Renamed adapter to "BaseAdapte
                                                                    ^
SyntaxError: Unexpected token B
    at Object.parse (native)
    at Object.git.log (/home/sanghee/Dev/bigdiff-code/lib/git.js:63:17)
    at ReaddirpReadable.<anonymous> (/home/sanghee/Dev/bigdiff-code/examples/searchCommits.js:21:11)
    at ReaddirpReadable.emit (events.js:107:17)