From 49dbf1f60dc5c6bcb6b3ffadf89e7e0c14106638 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Fri, 10 Aug 2018 07:00:06 +0100
Subject: Pearl: Require width or height to be at least 6 for Tricky

Josh Triplett reported:
> If I ask pearl to generate a 5x5 tricky puzzle, it runs forever.

I find that 5x6 or 6x5 works, so set the minimum accordingly.

References: https://bugs.debian.org/667963
---
 pearl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pearl.c b/pearl.c
index 4817416..e53b4da 100644
--- a/pearl.c
+++ b/pearl.c
@@ -274,6 +274,8 @@ static const char *validate_params(const game_params *params, bool full)
     if (params->h < 5) return "Height must be at least five";
     if (params->difficulty < 0 || params->difficulty >= DIFFCOUNT)
         return "Unknown difficulty level";
+    if (params->difficulty >= DIFF_TRICKY && params->w + params->h < 11)
+	return "Width or height must be at least six for Tricky";
 
     return NULL;
 }
-- 
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