TypeError: Cannot read property 'extsrc' of null
    at Object.tokenHandler (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/ext/Pre/index.js:48:24)
    at ExtensionHandler.onExtension (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/tt/ExtensionHandler.js:129:13)
    at AsyncTokenTransformManager.transformTokens (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/TokenTransformManager.js:624:17)
    at AsyncTokenTransformManager.onChunk (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/TokenTransformManager.js:397:17)
    at emitOne (events.js:96:13)
    at SyncTokenTransformManager.emit (events.js:188:7)
    at SyncTokenTransformManager.onChunk (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/TokenTransformManager.js:981:7)
    at emitOne (events.js:96:13)
    at PegTokenizer.emit (events.js:188:7)
    at emitChunk (eval at <anonymous> (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/tokenizer.js:1:0), <anonymous>:20442:25)
    at peg$c33 (eval at <anonymous> (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/tokenizer.js:1:0), <anonymous>:390:11)
    at peg$parsetlb (eval at <anonymous> (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/tokenizer.js:1:0), <anonymous>:3233:12)
    at Object.next (eval at <anonymous> (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/tokenizer.js:1:0), <anonymous>:1947:14)
    at Immediate.tokenizeChunk (/srv/deployment/parsoid/deploy-cache/revs/a95fede9efea415a2d06df41df1e3db0472d4482/src/lib/wt2html/tokenizer.js:299:20)
    at runCallback (timers.js:672:20)
    at tryOnImmediate (timers.js:645:5)