Fix bug 1011

frog/minfrog

Index: frog/minfrog
diff --git a/frog/minfrog b/frog/minfrog
index de6718ee1ae41c578c16ffd447a3d4f63d8cc2bb..49335215d9a7bdb04a858767a06b164eab2aec26 100755
--- a/frog/minfrog
+++ b/frog/minfrog
@@ -4116,6 +4116,9 @@ MethodGenerator.prototype.visitUnaryExpression = function(node) {
 
   }
 }
+MethodGenerator.prototype.visitDeclaredIdentifier = function(node) {
+  $globals.world.error('Expected expression', node.span);
+}
 MethodGenerator.prototype.visitAwaitExpression = function(node) {
   $globals.world.internalError('Await expressions should have been eliminated before code generation', node.span);
 }