Uncaught TypeError: Cannot read property 'clientX' of undefined

[DanFreed]

[Enter steps to reproduce below:]
I know this isn't going to help, but I have no idea how I made this error pop up. I had switched to Atom with cmd-tab, then possibly mouse dragged either the title bar or tab bar. That said I can't seem to make it happen again.

Atom Version: 1.9.0-beta0
System: Mac OS X 10.11.5
Thrown From: tabs package, v0.98.0

Stack Trace

Uncaught TypeError: Cannot read property 'clientX' of undefined

At /Applications/Atom Beta.app/Contents/Resources/app.asar/node_modules/tabs/lib/layout.js:66

TypeError: Cannot read property 'clientX' of undefined
    at Object.module.exports.getElement (/Applications/Atom Beta.app/Contents/Resources/app.asar/node_modules/tabs/lib/layout.js:66:21)
    at Object.module.exports.getItemViewAt (/Applications/Atom Beta.app/Contents/Resources/app.asar/node_modules/tabs/lib/layout.js:73:41)
    at Object.module.exports.end (/Applications/Atom Beta.app/Contents/Resources/app.asar/node_modules/tabs/lib/layout.js:32:17)
    at tabs-tab.ondragend (/Applications/Atom Beta.app/Contents/Resources/app.asar/node_modules/tabs/lib/tab-view.js:54:23)

Commands

Config

{
  "core": {
    "disabledPackages": [
      "autoflow",
      "bookmarks",
      "feedback",
      "metrics",
      "atom-perl-prove",
      "autocomplete-paths",
      "coffee-refactor",
      "color-picker",
      "dlg",
      "googlesearch",
      "js-refactor",
      "svndiff",
      "minimap",
      "coffee-refactor",
      "coffee-refactor",
      "coffee-refactor",
      "coffee-refactor",
      "coffee-refactor"
    ],
    "themes": [
      "native-ui",
      "solarized-dark-syntax-custom"
    ]
  },
  "tabs": {
    "enableVcsColoring": true,
    "usePreviewTabs": true
  }
}

Installed Packages

# User
atom-beautify, v0.29.9 (active)
atom-material-syntax, v0.4.6 (inactive)
atom-material-ui, v1.2.13 (inactive)
atom-text-transformer, v0.7.0 (active)
autocomplete-bash-builtins, v0.3.4 (active)
autocomplete-paths, v1.0.2 (inactive)
autohide-tree-view, v0.25.1 (active)
coffee-refactor, v0.7.0 (inactive)
color-picker, v2.2.1 (inactive)
dlg, v0.0.0 (inactive)
epic-lib, v0.0.1 (active)
file-icons, v1.7.16 (active)
googlesearch, v1.5.0 (inactive)
highlight-selected, v0.11.2 (active)
isotope-ui, v2.7.1 (inactive)
js-refactor, v0.7.3 (inactive)
keymaps, vundefined (active)
language-perl, v0.35.0 (active)
lib, vundefined (active)
lines, v0.13.1 (inactive)
linter, v1.11.14 (active)
linter-perl-check-syntax, v0.3.0 (active)
menus, vundefined (active)
minimap, v4.24.7 (inactive)
monokai-seti, v0.7.0 (inactive)
native-ui, v0.18.3 (active)
package-cop, v0.2.10 (active)
perldoc, v0.0.2 (inactive)
perltidy, v3.0.0 (active)
refactor, v0.9.2 (active)
save-session, vundefined (active)
seti-ui, v1.3.2 (inactive)
seti-ui-red, v0.13.0 (inactive)
solarized-dark-syntax-custom, v1.0.0 (active)
spec, vundefined (active)
styles, vundefined (active)
Sublime-Style-Column-Selection, v1.5.1 (active)
svndiff, v0.0.0 (inactive)
symbol-gen, v1.3.1 (active)
symbols-tree-view, v0.13.2 (active)
todo-show, v1.6.0 (inactive)
xml-formatter, v0.10.0 (inactive)
yosemate-ui, v0.7.1 (inactive)
atom-dark-syntax, v0.27.0 (inactive)
atom-dark-ui, v0.51.0 (inactive)
atom-light-syntax, v0.28.0 (inactive)
atom-light-ui, v0.43.0 (inactive)
base16-tomorrow-dark-theme, v1.1.0 (inactive)
base16-tomorrow-light-theme, v1.1.1 (inactive)
one-dark-ui, v1.3.2 (inactive)
one-light-ui, v1.3.2 (inactive)
one-dark-syntax, v1.2.0 (inactive)
one-light-syntax, v1.2.0 (inactive)
solarized-dark-syntax, v1.0.2 (inactive)
solarized-light-syntax, v1.0.2 (inactive)
about, v1.5.2 (active)
archive-view, v0.61.1 (active)
autocomplete-atom-api, v0.10.0 (active)
autocomplete-css, v0.11.1 (active)
autocomplete-html, v0.7.2 (active)
autocomplete-plus, v2.31.0 (active)
autocomplete-snippets, v1.11.0 (active)
autoflow, v0.27.0 (inactive)
autosave, v0.23.1 (active)
background-tips, v0.26.0 (active)
bookmarks, v0.41.0 (inactive)
bracket-matcher, v0.82.1 (active)
command-palette, v0.38.0 (inactive)
deprecation-cop, v0.54.1 (active)
dev-live-reload, v0.47.0 (active)
encoding-selector, v0.22.0 (active)
exception-reporting, v0.38.1 (active)
fuzzy-finder, v1.2.0 (active)
git-diff, v1.0.1 (active)
find-and-replace, v0.198.0 (active)
go-to-line, v0.31.0 (inactive)
grammar-selector, v0.48.1 (active)
image-view, v0.58.0 (active)
incompatible-packages, v0.26.1 (active)
keybinding-resolver, v0.35.0 (active)
line-ending-selector, v0.5.0 (active)
link, v0.31.1 (inactive)
markdown-preview, v0.158.0 (active)
metrics, v0.53.1 (inactive)
notifications, v0.64.1 (active)
open-on-github, v1.1.0 (inactive)
package-generator, v1.0.0 (inactive)
settings-view, v0.238.0 (active)
snippets, v1.0.2 (active)
spell-check, v0.67.1 (active)
status-bar, v1.3.1 (active)
styleguide, v0.46.0 (active)
symbols-view, v0.113.0 (active)
tabs, v0.98.0 (active)
timecop, v0.33.1 (active)
tree-view, v0.208.0 (active)
update-package-dependencies, v0.10.0 (active)
welcome, v0.34.0 (active)
whitespace, v0.32.2 (active)
wrap-guide, v0.38.1 (active)
language-c, v0.52.1 (active)
language-clojure, v0.21.0 (active)
language-coffee-script, v0.47.0 (active)
language-csharp, v0.12.1 (active)
language-css, v0.36.2 (active)
language-gfm, v0.86.0 (active)
language-git, v0.13.0 (active)
language-go, v0.42.0 (active)
language-html, v0.44.1 (active)
language-hyperlink, v0.16.0 (active)
language-java, v0.22.0 (active)
language-javascript, v0.119.0 (active)
language-json, v0.18.0 (active)
language-less, v0.29.3 (active)
language-make, v0.22.2 (active)
language-mustache, v0.13.0 (active)
language-objective-c, v0.15.1 (active)
language-perl, v0.35.0 (active)
language-php, v0.37.0 (active)
language-property-list, v0.8.0 (active)
language-python, v0.45.0 (active)
language-ruby, v0.68.5 (active)
language-ruby-on-rails, v0.25.0 (active)
language-sass, v0.52.0 (active)
language-shellscript, v0.22.3 (active)
language-source, v0.9.0 (active)
language-sql, v0.21.1 (active)
language-text, v0.7.1 (active)
language-todo, v0.28.0 (active)
language-toml, v0.18.0 (active)
language-xml, v0.34.8 (active)
language-yaml, v0.26.0 (active)

# Dev
No dev packages

[meepen]

Just got this on my client while viewing the project find results.

[50Wliu]

@meepdarknessmeep Can you reproduce it consistently or did it just happen once?

[ZuBB]

I got this for one time. But I am not able to provide reliable STR

[pirogoeth]

I've been able to reproduce it a couple times. With a couple files open, try to click+drag a tab over in either direction. Initially saw this while trying to drag a tab across to a different pane.

[nathansobo]

This will be fixed in 1.9.8.