From e1f8a9842a9af1ffbf679baf6021e03cd1031d49 Mon Sep 17 00:00:00 2001
From: "seer-by-sentry[bot]"
 <157164994+seer-by-sentry[bot]@users.noreply.github.com>
Date: Wed, 20 Aug 2025 04:45:53 +0000
Subject: [PATCH 1/2] Fix: Prevent exceptions when available size is zero or
 negative

---
 .../BreadcrumbBar/BreadcrumbBarLayout.cs            | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs b/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs
index 42f107a96712..d1bc93053aaa 100644
--- a/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs
+++ b/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs
@@ -33,6 +33,13 @@ protected override Size MeasureOverride(NonVirtualizingLayoutContext context, Si
 			var accumulatedSize = new Size(0, 0);
 			_availableSize = availableSize;
 
+			// Ensure we have a minimum size to prevent DivideByZeroException in WinUI
+			// When availableSize has zero dimensions, provide a minimal positive size for measurement
+			var measureSize = new Size(
+				Math.Max(availableSize.Width, 1.0),
+				Math.Max(availableSize.Height, 1.0)
+			);
+
 			var indexAfterEllipsis = GetFirstIndexToRender(context);
 
 			// Go through all items and measure them
@@ -40,7 +47,7 @@ protected override Size MeasureOverride(NonVirtualizingLayoutContext context, Si
 			{
 				if (context.Children[index] is BreadcrumbBarItem breadcrumbItem)
 				{
-					breadcrumbItem.Measure(availableSize);
+					breadcrumbItem.Measure(measureSize);
 					accumulatedSize.Width += index < indexAfterEllipsis ? 0 : breadcrumbItem.DesiredSize.Width;
 					accumulatedSize.Height = Math.Max(accumulatedSize.Height, breadcrumbItem.DesiredSize.Height);
 				}
@@ -98,6 +105,10 @@ private int GetFirstIndexToRender(NonVirtualizingLayoutContext context)
 			var itemCount = context.Children.Count;
 			var accumulatedWidth = 0d;
 
+			// Handle zero or negative available width - hide all items
+			if (_availableSize.Width <= 0)
+				return itemCount;
+
 			// Go through all items from the last item
 			for (int index = itemCount - 1; index >= 0; index--)
 			{

From 813a61a0fe6e96c6e80692a0a363b6a9264c5965 Mon Sep 17 00:00:00 2001
From: Yair <39923744+yaira2@users.noreply.github.com>
Date: Thu, 21 Aug 2025 00:21:14 -0400
Subject: [PATCH 2/2] Update BreadcrumbBarLayout.cs

---
 .../BreadcrumbBar/BreadcrumbBarLayout.cs              | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs b/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs
index d1bc93053aaa..5e1cb05089eb 100644
--- a/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs
+++ b/src/Files.App.Controls/BreadcrumbBar/BreadcrumbBarLayout.cs
@@ -33,13 +33,6 @@ protected override Size MeasureOverride(NonVirtualizingLayoutContext context, Si
 			var accumulatedSize = new Size(0, 0);
 			_availableSize = availableSize;
 
-			// Ensure we have a minimum size to prevent DivideByZeroException in WinUI
-			// When availableSize has zero dimensions, provide a minimal positive size for measurement
-			var measureSize = new Size(
-				Math.Max(availableSize.Width, 1.0),
-				Math.Max(availableSize.Height, 1.0)
-			);
-
 			var indexAfterEllipsis = GetFirstIndexToRender(context);
 
 			// Go through all items and measure them
@@ -47,7 +40,7 @@ protected override Size MeasureOverride(NonVirtualizingLayoutContext context, Si
 			{
 				if (context.Children[index] is BreadcrumbBarItem breadcrumbItem)
 				{
-					breadcrumbItem.Measure(measureSize);
+					breadcrumbItem.Measure(availableSize);
 					accumulatedSize.Width += index < indexAfterEllipsis ? 0 : breadcrumbItem.DesiredSize.Width;
 					accumulatedSize.Height = Math.Max(accumulatedSize.Height, breadcrumbItem.DesiredSize.Height);
 				}
@@ -122,4 +115,4 @@ private int GetFirstIndexToRender(NonVirtualizingLayoutContext context)
 			return 0;
 		}
 	}
-}
+}
\ No newline at end of file