Atom crashes on startup when package is enabled.

This just started today after a restart. I was able to isolate it to api-blueprint-preview by disabling all of my extensions and then reenabling them one at a time. (Luckily, it was the second in the list 😛). I am not sure how to get specific information about the crash, but here is the information about my configuration at least. I am happy to provide more information if requested.

### System Information
* Atom 1.12.5
* macOS 10.12.1

### Installed Packages
* advanced-open-file
* api-blueprint-preview
* atom-beautify
* atom-jade
* atom-material-syntax
* atom-material-ui
* atom-pair
* atom-typescript
* autocomplete-modules
* docblockr
* editorconfig
* emmet
* expand-region
* file-icons
* git-diff-details
* git-time-machine
* jscs-fixer
* language-api-blueprint
* language-docker
* language-javascript-better
* language-javascript-jsx
* language-svg
* linter
* linter-api-blueprint
* linter-htmlhint
* linter-jscs
* linter-scss-lint
* markdown-folder
* markdown-lists
* markdown-preview-opener
* markdown-scroll-sync
* markdown-table-formatter
* merge-conflicts
* minimap
* minimap-git-diff
* monokai-dark
* monokai-light
* pigments
* react
* sort-lines
* svg-preview
* tab-control
* todo-show
* travis-ci-status
* white-cursor

Start by reproducing the startup crash with api-blueprint-preview enabled under Atom 1.12.5 on macOS 10.12.1, then collect the specific crash information the report lacks. The work is done when the package can be enabled without causing Atom to crash on startup.

Written by the indexing model from the issue text.