Assertion failed: 
java.lang.Throwable
	at com.intellij.openapi.diagnostic.Logger.assertTrue(Logger.java:89)
	at com.intellij.openapi.diagnostic.Logger.assertTrue(Logger.java:96)
	at com.intellij.openapi.editor.impl.MarkupModelImpl.removeHighlighter(MarkupModelImpl.java:63)
	at org.jetbrains.plugins.ruby.rails.highlighter.codeHighlighting.RailsHighlightPassFactory.createHighlightingPass(RailsHighlightPassFactory.java:85)
	at com.intellij.codeInsight.daemon.impl.TextEditorHighlightingPassRegistrarImpl$1.execute(TextEditorHighlightingPassRegistrarImpl.java:2)
	at gnu.trove.TIntHash.forEach(TIntHash.java:157)
	at gnu.trove.TIntObjectHashMap.forEachKey(TIntObjectHashMap.java:389)
	at com.intellij.codeInsight.daemon.impl.TextEditorHighlightingPassRegistrarImpl.instantiatePasses(TextEditorHighlightingPassRegistrarImpl.java:40)
	at com.intellij.codeInsight.daemon.impl.TextEditorBackgroundHighlighter.a(TextEditorBackgroundHighlighter.java:13)
	at com.intellij.codeInsight.daemon.impl.TextEditorBackgroundHighlighter.createPassesForEditor(TextEditorBackgroundHighlighter.java:7)
	at com.intellij.codeInsight.daemon.impl.TextEditorBackgroundHighlighter.createPassesForEditor(TextEditorBackgroundHighlighter.java:8)
	at com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerImpl$2.run(DaemonCodeAnalyzerImpl.java:12)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:1)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:39)
	at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:41)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:119)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)