Uncaught Error: kill EPERM

[Enter steps to reproduce:]

1. ...
2. ...

**Atom**: 1.31.2 x64
**Electron**: 2.0.7
**OS**: Microsoft Windows 10 Home Single Language
**Thrown From**: [pigments](https://github.com/abe33/atom-pigments) package 0.40.2

### Stack Trace

Uncaught Error: kill EPERM

```
At events.js:183

Error: kill EPERM
at _errnoException (util.js:1024:11)
at ChildProcess.kill (internal/child_process.js:395:26)
at Task.module.exports.Task.terminate (~/AppData/Local/atom/app-1.31.2/resources/app/src/task.js:148:31)
at ColorBuffer.module.exports.ColorBuffer.terminateRunningTask (/packages/pigments/lib/color-buffer.coffee:166:35)
at /packages/pigments/lib/color-buffer.coffee:33:8
at Function.module.exports.Emitter.simpleDispatch (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/event-kit/lib/emitter.js:27:20)
at Emitter.module.exports.Emitter.emit (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/event-kit/lib/emitter.js:156:34)
at disposables.add.displayLayer.onDidChange.changes (~/AppData/Local/atom/app-1.31.2/resources/app/src/text-editor.js:615:26)
at Function.module.exports.Emitter.simpleDispatch (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/event-kit/lib/emitter.js:27:20)
at Emitter.module.exports.Emitter.emit (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/event-kit/lib/emitter.js:156:34)
at DisplayLayer.emitDeferredChangeEvents (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/text-buffer/lib/display-layer.js:819:26)
at TextBuffer.module.exports.TextBuffer.emitDidChangeTextEvent (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/text-buffer/lib/text-buffer.js:1802:30)
at TextBuffer.module.exports.TextBuffer.transact (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/text-buffer/lib/text-buffer.js:998:18)
at TextEditor.transact (~/AppData/Local/atom/app-1.31.2/resources/app/src/text-editor.js:2007:30)
at TextEditor.moveCursors (~/AppData/Local/atom/app-1.31.2/resources/app/src/text-editor.js:2880:23)
at TextEditor.setCursorScreenPosition (~/AppData/Local/atom/app-1.31.2/resources/app/src/text-editor.js:2691:23)
at TextEditorComponent.didMouseDownOnContent (~/AppData/Local/atom/app-1.31.2/resources/app/src/text-editor-component.js:1808:25)
```

### Commands

```
-1:29.9.0 atom-save-all:saveAll (input.hidden-input)
-1:23 autoclose-html:close-and-complete (input.hidden-input)
-1:22.6.0 emmet:insert-formatted-line-break-only (input.hidden-input)
-1:21.7.0 core:undo (input.hidden-input)
-1:20.9.0 editor:move-to-end-of-screen-line (input.hidden-input)
-1:20.6.0 emmet:insert-formatted-line-break-only (input.hidden-input)
-1:20.6.0 editor:newline (input.hidden-input)
-1:12 autoclose-html:close-and-complete (input.hidden-input)
-1:06.7.0 emmet:insert-formatted-line-break-only (input.hidden-input)
-1:06.7.0 editor:newline (input.hidden-input)
-1:02.4.0 autoclose-html:close-and-complete (input.hidden-input)
-0:53.3.0 core:move-left (input.hidden-input)
-0:52.5.0 core:undo (input.hidden-input)
-0:51.4.0 core:backspace (input.hidden-input)
-0:41.3.0 autoclose-html:close-and-complete (input.hidden-input)
4x -0:25.1.0 atom-save-all:saveAll (input.hidden-input)
```

### Non-Core Packages

```
angularjs 0.5.3
atom-ide-ui 0.13.0
atom-save-all 0.4.1
atom-ternjs 0.18.3
atom-typescript 12.6.3
autoclose-html 0.23.0
autocomplete-ionic2-framework 0.3.2
color-picker 2.3.0
emmet 2.4.3
highlight-selected 0.14.0
logo-file-icons 1.13.0
minimap 4.29.8
minimap-highlight-selected 4.6.1
minimap-pigments 0.2.2
multi-cursor 2.1.5
pigments 0.40.2
platformio-ide-terminal 2.8.4
```

The error originates in the color-buffer.coffee file at line 166, where a task termination fails with a kill EPERM on Windows. Start by examining the task termination logic in that file and the underlying Atom Task API. Look for race conditions or improper process handling on Windows. Check if there are existing tests for the color buffer or task termination to understand the expected behavior.

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