From bb7b3c510f59ec1502e90d2ab8f3b41b2c92bfa7 Mon Sep 17 00:00:00 2001
From: Nikolaj Bjorner <nbjorner@microsoft.com>
Date: Wed, 26 Jul 2017 19:52:05 -0700
Subject: [PATCH] fix for #1161

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
---
 src/cmd_context/tactic_cmds.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cmd_context/tactic_cmds.cpp b/src/cmd_context/tactic_cmds.cpp
index 2b60486f7..119deec8c 100644
--- a/src/cmd_context/tactic_cmds.cpp
+++ b/src/cmd_context/tactic_cmds.cpp
@@ -308,6 +308,9 @@ public:
     }
 
     virtual void execute(cmd_context & ctx) {
+        if (!m_tactic) {
+            throw cmd_exception("apply needs a tactic argument");
+        }
         params_ref p = ctx.params().merge_default_params(ps());
         tactic_ref tref = using_params(sexpr2tactic(ctx, m_tactic), p);
         {