Fix crash on Mac with Touch Bar

CHANGELOG.md

@@ -2,6 +2,15 @@
 Change Log
 ==========================
 
+3.1.7 (188)
+--------------------------
+
+### Fixes
+
+- Fix an issue on MacBook Pro with Touch Bar where the application crashed immediately after launch.
+
+
+
 3.1.6 (186)
 --------------------------
 

CotEditor/CotEditor.help/Contents/Resources/en.lproj/pgs/releasenotes.html

@@ -22,6 +22,23 @@
 <h1>Release Notes</h1>
 
 
+<article>
+<header>
+	<h1>CotEditor 3.1.7</h1>
+	<p>release: <time>2016-03-03</time></p>
+</header>
+
+
+<section>
+<h3>Fixes</h3>
+
+<ul>
+	<li>Fix an issue on MacBook Pro with Touch Bar where the application crashed immediately after launch.</li>
+</ul>
+</section>
+</article>
+
+
 <article>
 <header>
 	<h1>CotEditor 3.1.6</h1>

CotEditor/CotEditor.help/Contents/Resources/ja.lproj/pgs/releasenotes.html

@@ -22,6 +22,23 @@
 <h1>リリースノート</h1>
 
 
+<article>
+<header>
+	<h1>CotEditor 3.1.7</h1>
+	<p>リリース: <time>2016-03-03</time></p>
+</header>
+
+
+<section>
+<h3>Fixes</h3>
+
+<ul>
+	<li>Touch Bar の付いた MacBook Pro で起動直後にアプリケーションがクラッシュする不具合を修正しました。</li>
+</ul>
+</section>
+</article>
+
+
 <article>
 <header>
 	<h1>CotEditor 3.1.6</h1>

CotEditor/Sources/NSTouchBar+Validation.swift

@@ -218,14 +218,11 @@ extension NSCustomTouchBarItem: NSValidatedUserInterfaceItem {
             let validator = NSApp.target(forAction: action, to: control.target, from: self)
             else { return }
         
-        switch validator {
-        case let validator as TouchBarItemValidations:
+        // ! DO NOT use `swich ... case let` to classify. It causes crash.
+        if let validator = validator as? TouchBarItemValidations {
             control.isEnabled = validator.validateTouchBarItem(self)
-            
-        case let validator as NSUserInterfaceValidations:
-            control.isEnabled = validator.validateUserInterfaceItem(self)
-            
-        default: break
+        } else if let validator = validator as? NSUserInterfaceValidations {
+            control.isEnabled = (validator as AnyObject).validateUserInterfaceItem(self)
         }
     }