From 9148b8f19e638c15cca22350194ade9985151c5f Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Wed, 8 Jan 2020 01:52:16 +0000
Subject: [PATCH] Fix infinite loop in pregap calculation when subchannel comes
 empty.

---
 DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs b/DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs
index 2b2d871ba..778a27bea 100644
--- a/DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs
+++ b/DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs
@@ -250,6 +250,13 @@ namespace DiscImageChef.Core.Devices.Dumping
                         updateStatus?.Invoke($"Could not get correct subchannel for sector {lba}");
                     }
 
+                    if(subBuf.All(b => b == 0))
+                    {
+                        inexactPositioning = true;
+
+                        break;
+                    }
+
                     BcdToBinaryQ(subBuf);
 
                     // If it's not Q position