Uncaught TypeError: Cannot read property 'compositionInProgress' of null

[TheSeamau5]

[Enter steps to reproduce below:]

1. See this issue
2. Now editor is completely frozen and unusable. Any attempts to press a keyboard key triggers this error :(

Atom Version: 0.175.0
System: Mac OS X 10.10.1
Thrown From: autocomplete-plus package, v2.0.12

Stack Trace

Uncaught TypeError: Cannot read property 'compositionInProgress' of null

At /Users/hassanhayat/.atom/packages/autocomplete-plus/lib/autocomplete-manager.coffee:234

TypeError: Cannot read property 'compositionInProgress' of null
  at AutocompleteManager.module.exports.AutocompleteManager.bufferChanged (/Users/hassanhayat/.atom/packages/autocomplete-plus/lib/autocomplete-manager.coffee:234:30)
  at /Users/hassanhayat/.atom/packages/autocomplete-plus/lib/autocomplete-manager.coffee:1:1
  at Emitter.module.exports.Emitter.emit (/Applications/Atom.app/Contents/Resources/app/node_modules/service-hub/node_modules/event-kit/lib/emitter.js:82:11)
  at TextBuffer.module.exports.TextBuffer.applyPatch (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/text-buffer.js:594:20)
  at BufferPatch.module.exports.BufferPatch.applyTo (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/buffer-patch.js:74:21)
  at Transaction.module.exports.Transaction.applyTo (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/transaction.js:60:29)
  at History.module.exports.History.abortTransaction (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/history.js:165:24)
  at History.module.exports.History.transact (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/history.js:122:16)
  at TextBuffer.module.exports.TextBuffer.transact (/Applications/Atom.app/Contents/Resources/app/node_modules/text-buffer/lib/text-buffer.js:687:27)
  at TextEditor.module.exports.TextEditor.transact (/Applications/Atom.app/Contents/Resources/app/src/text-editor.js:1178:26)
  at [object Object].module.exports.React.createClass.onTextInput (/Applications/Atom.app/Contents/Resources/app/src/text-editor-component.js:647:30)
  at HTMLDivElement.boundMethod (/Applications/Atom.app/Contents/Resources/app/node_modules/react-atom-fork/lib/ReactCompositeComponent.js:1295:21)

Commands

     -6:41.4 editor:indent (atom-text-editor.editor.is-focused)
     -6:40.9 editor:newline (atom-text-editor.editor.is-focused)
  4x -6:40.1 core:backspace (atom-text-editor.editor.is-focused)
     -6:37.8 core:move-left (atom-text-editor.editor.is-focused)
     -6:37.0 core:move-right (atom-text-editor.editor.is-focused)
     -6:31.7 autocomplete-plus:confirm (input)
  5x -6:28.7 core:backspace (atom-text-editor.editor.is-focused)
     -5:54.4 core:move-left (atom-text-editor.editor.is-focused)
     -5:40.1 core:backspace (atom-text-editor.editor.is-focused)
     -5:39.3 core:move-right (atom-text-editor.editor.is-focused)
     -5:33.1 core:save (atom-text-editor.editor.is-focused)
     -5:31.2 settings-view:check-for-package-updates (atom-workspace.workspace.scrollbars-visible-always.theme-atom-dark-syntax.theme-atom-dark-ui)
  2x -4:36.1 editor:newline (atom-text-editor.editor.is-focused)
     -0:00.6 core:move-up (atom-text-editor.editor.is-focused)
     -0:00.2 core:move-down (atom-text-editor.editor.is-focused)
  3x -0:00.0 core:move-left (atom-text-editor.editor.is-focused)

Config

{
  "core": {
    "disabledPackages": [
      "linter-gjslint",
      "linter",
      "linter-dartanalyzer"
    ]
  }
}

Installed Packages

# User
atom-beautify, v0.21.2
atom-typescript-tools, v0.6.2
autoclose-html, v0.14.0
autocomplete-plus, v2.0.12
better-language-dart, v1.0.1
color-picker, v1.4.4
dart-tools, v0.8.5
language-ada, v0.2.0
language-coq, v0.1.0
language-css-plus, v0.3.0
language-d, v3.0.1
language-elm, v0.4.1
language-glsl, v0.2.2
language-julia, v2.0.0
language-opencl, v0.1.0
language-pegjs, v0.5.0
language-r, v0.1.1
language-sml, v0.2.0
language-typescript, v0.15.0
language-x86, v0.1.0
linter-csslint, v0.0.11
minimap, v4.1.0

# Dev
No dev packages

/cc @atom/core

[joefitzgerald]

Please update your version of Atom to 0.177.0 or later.

[TheSeamau5]

Cool. Thanks. I updated my version of Atom and I haven't encountered this error yet. I'll let you know if this ever comes up again. Thanks for your help.

[TheSeamau5]

The issue that I've created that references this issue is caused the same way than this issue. I recommend re-opening this issue as they seem related.

From the error, it would seem that there is some sort of unchecked null and this unchecked null could be seeping into all sorts of places.

[TheSeamau5]

Also, it is important to note that autocomplete-plus was among the packages being updated while I went back to the code and tried typing some code (where autocomplete-plus was being used)