Failed to run script updater.

Kinda frustrating. Can anyone help with this??

Failed to run script updater. Please, report a bug to Unity with these details

 System.IndexOutOfRangeException: Array index is out of range.
   at BooUpdater.BooDocument.FindPrevious (Boo.Lang.Compiler.Ast.LexicalInfo start, Char c) [0x00000] in <filename unknown>:0 
   at UnityScriptUpdater.FixParsedSourceLocations.OnMethodInvocationExpression (Boo.Lang.Compiler.Ast.MethodInvocationExpression node) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.MethodInvocationExpression.Accept (IAstVisitor visitor) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.FastDepthFirstVisitor.OnExpressionStatement (Boo.Lang.Compiler.Ast.ExpressionStatement node) [0x00000] in <filename unknown>:0 
   at UnityScriptUpdater.FixParsedSourceLocations.OnExpressionStatement (Boo.Lang.Compiler.Ast.ExpressionStatement node) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.ExpressionStatement.Accept (IAstVisitor visitor) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.FastDepthFirstVisitor.OnBlock (Boo.Lang.Compiler.Ast.Block node) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.Block.Accept (IAstVisitor visitor) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.FastDepthFirstVisitor.OnConstructor (Boo.Lang.Compiler.Ast.Constructor node) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.Constructor.Accept (IAstVisitor visitor) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.FastDepthFirstVisitor.OnClassDefinition (Boo.Lang.Compiler.Ast.ClassDefinition node) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.ClassDefinition.Accept (IAstVisitor visitor) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.FastDepthFirstVisitor.OnModule (Boo.Lang.Compiler.Ast.Module node) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.Module.Accept (IAstVisitor visitor) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.FastDepthFirstVisitor.OnCompileUnit (Boo.Lang.Compiler.Ast.CompileUnit node) [0x00000] in <filename unknown>:0 
   at Boo.Lang.Compiler.Ast.CompileUnit.Accept (IAstVisitor visitor) [0x00000] in <filename unknown>:0 
   at BooUpdater.BooUpdater.FixParsedSourceLocations (IEnumerable`1 inputs, IAPIUpdaterListener listener, Boo.Lang.Compiler.CompilerContext result) [0x00000] in <filename unknown>:0 
   at BooUpdater.BooUpdater.CompileScripts (IEnumerable`1 inputs, IEnumerable`1 defines, IEnumerable`1 references) [0x00000] in <filename unknown>:0 
   at BooUpdater.BooUpdater.RunUpdater (APIUpdater.Framework.Core.SourceFile[] inputs, IEnumerable`1 defines, IEnumerable`1 references) [0x00000] in <filename unknown>:0 
   at APIUpdater.Framework.Core.APIUpdaterBase.Update (APIUpdater.Framework.Core.SourceFile[] inputs, IEnumerable`1 defines, IEnumerable`1 references) [0x00000] in <filename unknown>:0 
   at ScriptUpdater.Program.UpdateLanguage (IScriptUpdater updater, APIUpdater.Framework.Configuration.CompilerResponseFile responseFile, System.String unityDataPath, System.String outputPath) [0x00000] in <filename unknown>:0 
   at ScriptUpdater.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 

UnityEditor.Scripting.Compilers.ScriptCompilerBase:BeginCompiling()