From 72c09cc0bf6247a36c9a2dae6109ca4583ff2f6e Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Mon, 19 Jan 2009 22:29:36 -0400
Subject: [PATCH] Generate a better error if a function operand is invalid.

---
 src/op.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/op.cc b/src/op.cc
index b19ac730..75c2d5e8 100644
--- a/src/op.cc
+++ b/src/op.cc
@@ -93,12 +93,11 @@ value_t expr_t::op_t::calc(scope_t& scope)
       call_args.set_args(right()->calc(scope));
 
     ptr_op_t func = left();
-    string   name;
 
     assert(func->kind == IDENT);
     func = func->left();
 
-    if (func->kind != FUNCTION)
+    if (! func || func->kind != FUNCTION)
       throw_(calc_error, "Calling non-function");
 
     return func->as_function()(call_args);