From d1871d87dc80cb4687a3b944b48dc5482376a755 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Sun, 14 Oct 2012 18:29:34 +0200
Subject: [PATCH] * src/bin/ltlcheck.cc: Diagnose missing output format.

---
 src/bin/ltlcheck.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/bin/ltlcheck.cc b/src/bin/ltlcheck.cc
index 729cc2fae..c4396dd3d 100644
--- a/src/bin/ltlcheck.cc
+++ b/src/bin/ltlcheck.cc
@@ -491,6 +491,11 @@ namespace
       std::ostringstream command;
       format(command, translators[translator_num]);
       toclean.push_back(output.val());
+
+      if (output.format == printable_result_filename::None)
+	error(2, 0, "no output sequence used in %s",
+	      translators[translator_num]);
+
       std::string cmd = command.str();
       std::cerr << "Running [" << l << translator_num << "]: "
 		<< cmd << std::endl;