Fix Meteor #7679

Based on meteorhacks#258

lib/hijack/wrap_session.js

@@ -160,22 +160,37 @@ function wrapMethodHanderForErrors(name, originalHandler, methodMap) {
     try{
       return originalHandler.apply(this, arguments);
     } catch(ex) {
+      // create a kadira exception
+      // don't change the original exception so that
+      // Meteor output of the exception is not impacted
+      // Meteor #7679
+      var kex;
       if(ex && Kadira._getInfo()) {
         // sometimes error may be just an string or a primitive
         // in that case, we need to make it a psuedo error
         if(typeof ex !== 'object') {
-          ex = {message: ex, stack: ex};
+          kex = {message: ex, stack: ex};
+        } else {
+          // create a new error via constructor
+          // set stack properly
+          if(ex.constructor) {
+            kex = new ex.constructor();
+            kex.message = ex.message;
+          } else {
+            kex = {message: ex.message};
+          }
         }
+
         // Now we are marking this error to get tracked via methods
         // But, this also triggers a Meteor.debug call and 
         // it only gets the stack
         // We also track Meteor.debug errors and want to stop 
         // tracking this error. That's why we do this
         // See Meteor.debug error tracking code for more
         if (Kadira.options.enableErrorTracking) {
-          ex.stack = {stack: ex.stack, source: 'method'};
+          kex.stack = {stack: kex.stack, source: 'method'};
         }
-        Kadira._getInfo().currentError = ex;
+        Kadira._getInfo().currentError = kex;
       }
       throw ex;
     }