Uncaught TypeError: Cannot read property 'getTokenIterator' of undefined

[Enter steps to reproduce below:]
1. ...
2. ...

**Atom Version**: 1.0.2
**System**: Mac OS X 10.10.3
**Thrown From**: [minimap-color-highlight](https://github.com/abe33/minimap-color-highlight) package, v4.1.4
### Stack Trace

Uncaught TypeError: Cannot read property 'getTokenIterator' of undefined

```
At /Applications/Atom.app/Contents/Resources/app.asar/src/tokenized-buffer.js:689

TypeError: Cannot read property 'getTokenIterator' of undefined
at TokenizedBuffer.module.exports.TokenizedBuffer.scopeDescriptorForPosition (/Applications/Atom.app/Contents/Resources/app.asar/src/tokenized-buffer.js:689:42)
at DisplayBuffer.module.exports.DisplayBuffer.scopeDescriptorForBufferPosition (/Applications/Atom.app/Contents/Resources/app.asar/src/display-buffer.js:1135:35)
at MinimapColorHighlighView.getScope (/Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:79:44)
at MinimapColorHighlighView.markerHiddenDueToComment (/Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:87:16)
at MinimapColorHighlighView.markerHidden (/Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:73:8)
at MinimapColorHighlighView.markersUpdated (/Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:54:22)
at MinimapColorHighlighView.markersUpdated (/Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:1:1)
at MinimapColorHighlighView.updateMarkers (/Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:47:8)
at MinimapColorHighlighView.updateMarkers (/Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:1:1)
at /Users/kdavis/.atom/packages/minimap-color-highlight/lib/minimap-color-highlight-view.coffee:43:10

```
### Commands

```
```
### Config

``` json
{
"core": {
"ignoredNames": [
".git",
".DS_Store",
"*.pyc"
],
"disabledPackages": [
"snippets",
"atomatigit",
"linter-flake8",
"tree-view-filter",
"notebook",
"open-last-project",
"regex-railroad-diagram"
]
}
}
```
### Installed Packages

``` coffee
# User
Sublime-Style-Column-Selection, v1.3.0
atom-color-highlight, v3.0.9
atom-handlebars, v1.0.0
atom-python-debugger, v0.3.4
auto-update-packages, v1.0.0
change-case, v0.6.0
coffee-compile, v0.16.1
coffee-refactor, v0.6.2
color-picker, v2.0.9
docblockr, v0.7.2
emmet, v2.3.12
file-icons, v1.5.8
git-log, v0.4.1
git-tab-status, v1.9.2
highlight-line, v0.11.0
highlight-selected, v0.10.1
js-refactor, v0.4.2
language-python-django, v0.3.1
linter, v1.2.3
linter-coffeelint, v1.0.0
minimap, v4.11.0
minimap-color-highlight, v4.1.4
minimap-find-and-replace, v4.2.0
minimap-git-diff, v4.1.4
minimap-highlight-selected, v4.3.0
minimap-selection, v4.3.0
refactor, v0.5.1
symbols-tree-view, v0.9.3
view-tail-large-files, v0.2.0

# Dev
No dev packages
```

The error occurs in minimap-color-highlight-view.coffee at line 79, where getScope calls scopeDescriptorForBufferPosition. The tokenized buffer is undefined, likely due to a missing or invalid buffer reference. Start by examining the view's initialization and how it accesses the editor buffer. Check if the buffer exists when markers are updated. Run the package in Atom's dev mode to reproduce the error and trace the undefined value.

索引モデルが issue の本文から書いたものです。