better error reporting

loader.js

@@ -845,9 +845,16 @@
 
   // carefully scoped eval with given global
   var __scopedEval = function(__source, global, __sourceURL, __sourceMappingURL) {
-    eval('with(global) { (function() { ' + __source + ' \n }).call(global); }'
-      + (__sourceURL && !__source.match(/\/\/[@#] ?(sourceURL|sourceMappingURL)=(.+)/)
-      ? '\n//# sourceURL=' + __sourceURL : ''));
+    try {
+      eval('with(global) { (function() { ' + __source + ' \n }).call(global); }'
+        + (__sourceURL && !__source.match(/\/\/[@#] ?(sourceURL|sourceMappingURL)=(.+)/)
+        ? '\n//# sourceURL=' + __sourceURL : ''));
+    }
+    catch(e) {
+      if (e.name == 'SyntaxError')
+        e.message = 'Evaluating ' + __sourceURL + '\n\t' + e.message;
+      throw e;
+    }
   }
 
 })();

test/test.html

@@ -71,6 +71,15 @@
             return 'Error defining module';
         }
       },
+      {
+        name: 'Error handling',
+        run: function(complete) {
+          jspm.import('./tests/error', complete);
+        },
+        confirm: function() {
+          return;
+        }
+      },
       {
         name: 'Global script loading',
         run: function(complete) {

test/tests/error.js

@@ -0,0 +1,3 @@
+setTimeout(function() {
+  throw 'error';
+}, 1000);