In JsRT modes fixed a problems in calculation of error locations

Author: Taritsyn

src/MsieJavaScriptEngine/JsRt/ChakraJsRtJsEngineBase.cs

@@ -3,6 +3,7 @@
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
 #endif
+using System.Text.RegularExpressions;
 
 namespace MsieJavaScriptEngine.JsRt
 {
@@ -11,6 +12,13 @@ namespace MsieJavaScriptEngine.JsRt
 	/// </summary>
 	internal abstract class ChakraJsRtJsEngineBase : InnerJsEngineBase
 	{
+		/// <summary>
+		/// Regular expression for working with the string representation of error
+		/// </summary>
+		private static readonly Regex _errorStringRegex =
+			new Regex(@"[ ]{3,5}at (?:[A-Za-z_\$][0-9A-Za-z_\$ ]* )?" +
+				@"\([^\s*?""<>|][^\t\n\r*?""<>|]*?:(?<lineNumber>\d+):(?<columnNumber>\d+)\)");
+
 		/// <summary>
 		/// JS source context
 		/// </summary>
@@ -59,6 +67,31 @@ protected ChakraJsRtJsEngineBase(JsEngineMode engineMode, bool enableDebugging)
 		}
 
 
+		/// <summary>
+		/// Gets a error coordinates from message
+		/// </summary>
+		/// <param name="message">Error message</param>
+		/// <param name="lineNumber">Line number</param>
+		/// <param name="columnNumber">Column number</param>
+		protected static void GetErrorCoordinatesFromMessage(string message, out int lineNumber,
+			out int columnNumber)
+		{
+			lineNumber = 0;
+			columnNumber = 0;
+
+			if (!string.IsNullOrWhiteSpace(message))
+			{
+				Match errorStringMatch = _errorStringRegex.Match(message);
+				if (errorStringMatch.Success)
+				{
+					GroupCollection errorStringGroups = errorStringMatch.Groups;
+
+					lineNumber = int.Parse(errorStringGroups["lineNumber"].Value);
+					columnNumber = int.Parse(errorStringGroups["columnNumber"].Value);
+				}
+			}
+		}
+
 		/// <summary>
 		/// Starts debugging
 		/// </summary>

src/MsieJavaScriptEngine/JsRt/Edge/ChakraEdgeJsRtJsEngine.cs

@@ -854,6 +854,11 @@ private JsRuntimeException ConvertJsExceptionToJsRuntimeException(
 					columnNumber = columnPropertyValue.ConvertToNumber().ToInt32() + 1;
 				}
 
+				if (lineNumber <= 0 && columnNumber <= 0)
+				{
+					GetErrorCoordinatesFromMessage(message, out lineNumber, out columnNumber);
+				}
+
 				EdgeJsPropertyId sourcePropertyId = EdgeJsPropertyId.FromString("source");
 				if (errorValue.HasProperty(sourcePropertyId))
 				{

src/MsieJavaScriptEngine/JsRt/Ie/ChakraIeJsRtJsEngine.cs

@@ -878,6 +878,11 @@ private JsRuntimeException ConvertJsExceptionToJsRuntimeException(
 					columnNumber = (int)columnPropertyValue.ConvertToNumber().ToDouble() + 1;
 				}
 
+				if (lineNumber <= 0 && columnNumber <= 0)
+				{
+					GetErrorCoordinatesFromMessage(message, out lineNumber, out columnNumber);
+				}
+
 				IeJsPropertyId sourcePropertyId = IeJsPropertyId.FromString("source");
 				if (errorValue.HasProperty(sourcePropertyId))
 				{