Uncaught TypeError: Cannot read property 'line' of undefined

[shmaltz]

Getting this error trying to use this linter:

Uncaught TypeError: Cannot read property 'line' of undefined
    at groupByLine (lint.js?ver=10.5.0:107)
    at updateLinting (lint.js?ver=10.5.0:167)
    at lint.js?ver=10.5.0:159
    at runInOp (codemirror.js?ver=10.5.0:3921)
    at CodeMirror.operation (codemirror.js?ver=10.5.0:8603)
    at startLinting (lint.js?ver=10.5.0:159)
    at lint.js?ver=10.5.0:206

Also, is this rep still being maintained?