I didn't take any concrete action that I know of; this happened while the package was loading.
Atom: 1.21.1 x64
Electron: 1.6.15
OS: Mac OS X 10.12.6
Thrown From: regex-railroad-diagram package 0.19.4
Stack Trace
Failed to load the regex-railroad-diagram package
At Cannot find module 'underscore-plus'
Error: Cannot find module 'underscore-plus'
at Module._resolveFilename (module.js:470:15)
at Module._resolveFilename (/Applications/Atom.app/Contents/Resources/electron.asar/common/reset-search-paths.js:35:12)
at Function.get_Module._resolveFilename (/Applications/Atom.app/Contents/Resources/app/src/module-cache.js:354:58)
at Module.require (/app.asar/static/index.js:40:43)
at require (/Applications/Atom.app/Contents/Resources/app/src/native-compile-cache.js:66:33)
at /packages/regex-railroad-diagram/lib/regex-railroad-diagram.coffee:3:14)
at /packages/regex-railroad-diagram/lib/regex-railroad-diagram.coffee:2:1)
at /packages/regex-railroad-diagram/lib/regex-railroad-diagram.coffee:2:1)
at Module.get_Module._compile (/Applications/Atom.app/Contents/Resources/app/src/native-compile-cache.js:106:36)
at Object.value [as .coffee] (/Applications/Atom.app/Contents/Resources/app/src/compile-cache.js:239:29)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Module.require (/app.asar/static/index.js:47:45)
at require (internal/module.js:20:19)
at customRequire (/Applications/Atom.app/Contents/Resources/app/static/<embedded>:96:26)
at Package.module.exports.Package.requireMainModule (/Applications/Atom.app/Contents/Resources/app/src/package.js:903:35)
at /Applications/Atom.app/Contents/Resources/app/src/package.js:158:34
at Package.module.exports.Package.measure (/Applications/Atom.app/Contents/Resources/app/src/package.js:99:21)
at Package.module.exports.Package.load (/Applications/Atom.app/Contents/Resources/app/src/package.js:144:18)
at PackageManager.loadAvailablePackage (/Applications/Atom.app/Contents/Resources/app/src/package-manager.js:617:16)
at config.transact (/Applications/Atom.app/Contents/Resources/app/src/package-manager.js:530:20)
at Config.module.exports.Config.transact (/Applications/Atom.app/Contents/Resources/app/src/config.js:342:22)
at PackageManager.loadPackages (/Applications/Atom.app/Contents/Resources/app/src/package-manager.js:528:23)
at /Applications/Atom.app/Contents/Resources/app/src/atom-environment.js:821:34
[Enter steps to reproduce:]
I didn't take any concrete action that I know of; this happened while the package was loading.
Atom: 1.21.1 x64 Electron: 1.6.15 OS: Mac OS X 10.12.6 Thrown From: regex-railroad-diagram package 0.19.4
Stack Trace
Failed to load the regex-railroad-diagram package
Commands
Non-Core Packages