From a61534d288e1fbdf0eac808551688d3d988a2fe2 Mon Sep 17 00:00:00 2001
From: "Felix W. Dekker" <felix@fwdekker.com>
Date: Thu, 30 Jul 2020 12:05:36 +0200
Subject: [PATCH] Resolve annoying matrix error message

Fixes #21.
---
 package.json         | 2 +-
 src/main/js/index.js | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 3dcb2a3..b393fe8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "minesweeper",
-    "version": "0.0.22",
+    "version": "0.0.23",
     "description": "Just Minesweeper!",
     "author": "Felix W. Dekker",
     "browser": "dist/bundle.js",
diff --git a/src/main/js/index.js b/src/main/js/index.js
index e60a31e..f18ea2a 100644
--- a/src/main/js/index.js
+++ b/src/main/js/index.js
@@ -164,6 +164,8 @@ class Solver {
      * @param field {Field} the field to solve
      */
     bigStep(field) {
+        if (!field.started || field.won || field.lost) return;
+
         const knowns = field.squareList
             .filter(it => !it.isCovered)
             .filter(it => it.getNeighborCount(it => it.isCovered && !it.hasFlag));
@@ -171,6 +173,8 @@ class Solver {
             knowns.reduce((neighs, square) => neighs.concat(square.getNeighbors()), [])
         )).filter(it => it.isCovered && !it.hasFlag);
 
+        if (knowns.length === 0 || neighs.length === 0) return;
+
         const matrix = [];
         // TODO Add row for remaining mines
         knowns.forEach(square => {