lsif-node: Error: There was already a managed document data for file

When running node /Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/main.js --noContents --out=dump.lsif -p . (using https://github.com/sourcegraph/lsif-node/tree/e71e4db3b05895f4d88a64c7f3d5558621460622) on https://github.com/sourcegraph/sourcegraph/tree/85297b68a966c41576aaba10f16f5b7048ee007c/web

..................................................................................................Error: There was already a managed document data for file: /Users/chrismwendt/github.com/sourcegraph/sourcegraph/shared/src/globals.d.ts
    at DataManager.getDocumentData (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/lsif.js:1161:19)
    at Visitor.getOrCreateDocumentData (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/lsif.js:1681:39)
    at Visitor.getOrCreateSymbolData (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/lsif.js:1727:37)
    at Visitor.handleSymbol (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/lsif.js:1620:31)
    at Visitor.visitIdentifier (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/lsif.js:1611:14)
    at Visitor.visit (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/lsif.js:1364:22)
    at /Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/lib/lsif.js:1377:45
    at visitNode (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/node_modules/typescript/lib/typescript.js:16622:24)
    at Object.forEachChild (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/node_modules/typescript/lib/typescript.js:16802:24)
    at NodeObject.forEachChild (/Users/chrismwendt/github.com/Microsoft/lsif-node/tsc/node_modules/typescript/lib/typescript.js:121434:23)

Possibly related https://github.com/microsoft/lsif-node/issues/49