From: Simon Tatham <anakin@pobox.com>
Date: Sun, 29 Jul 2012 21:29:26 +0000 (+0000)
Subject: Don't fail an assertion when setting up the provided clues at the
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=bbf800e49ee5965c21eb4a89116e7529d0d4954f;p=sgt-puzzles.git

Don't fail an assertion when setting up the provided clues at the
start of the solver, if they contradict each other. (Could trigger on
user-provided grids.)

[originally from svn r9594]
---

diff --git a/solo.c b/solo.c
index 7062194..43abc1f 100644
--- a/solo.c
+++ b/solo.c
@@ -1773,9 +1773,16 @@ static void solver(int cr, struct block_structure *blocks,
      * Place all the clue numbers we are given.
      */
     for (x = 0; x < cr; x++)
-	for (y = 0; y < cr; y++)
-	    if (grid[y*cr+x])
+	for (y = 0; y < cr; y++) {
+            int n = grid[y*cr+x];
+	    if (n) {
+                if (!cube(x,y,n)) {
+                    diff = DIFF_IMPOSSIBLE;
+                    goto got_result;
+                }
 		solver_place(usage, x, y, grid[y*cr+x]);
+            }
+        }
 
     /*
      * Now loop over the grid repeatedly trying all permitted modes