From c898587b87c5501fb0278990fb2bd5b2bb339fb1 Mon Sep 17 00:00:00 2001
From: YRabbit <rabbit@yrabbit.cyou>
Date: Wed, 16 Mar 2022 15:47:13 +1000
Subject: gowin: don't crash if no arguments are set

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
---
 gowin/main.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gowin/main.cc b/gowin/main.cc
index 19c1d02c..a45a49d4 100644
--- a/gowin/main.cc
+++ b/gowin/main.cc
@@ -56,6 +56,10 @@ po::options_description GowinCommandHandler::getArchOptions()
 
 std::unique_ptr<Context> GowinCommandHandler::createContext(dict<std::string, Property> &values)
 {
+    if (!vm.count("device")) {
+        log_error("The device must be specified\n");
+    }
+
     std::regex devicere = std::regex("GW1N([SZ]?)[A-Z]*-(LV|UV|UX)([0-9])(C?).*");
     std::smatch match;
     std::string device = vm["device"].as<std::string>();
-- 
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