From 4f977b1ad990cdc9af8d26db1dbf0cf8715b3bad Mon Sep 17 00:00:00 2001
From: Dongbo Wang <dongbow@microsoft.com>
Date: Wed, 6 Jul 2022 13:53:06 -0700
Subject: [PATCH] No list view prediction when the first line was scrolled up
 off the buffer

---
 PSReadLine/Prediction.Views.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/PSReadLine/Prediction.Views.cs b/PSReadLine/Prediction.Views.cs
index e61d396cd..ce1eec3e8 100644
--- a/PSReadLine/Prediction.Views.cs
+++ b/PSReadLine/Prediction.Views.cs
@@ -275,6 +275,13 @@ internal PredictionListView(PSConsoleReadLine singleton)
 
             internal override void GetSuggestion(string userInput)
             {
+                if (_singleton._initialY < 0)
+                {
+                    // Do not trigger list view prediction when the first line has already been scrolled up off the buffer.
+                    // See https://github.com/PowerShell/PSReadLine/issues/3347 for an example where this may happen.
+                    return;
+                }
+
                 bool inputUnchanged = string.Equals(_inputText, userInput, _singleton._options.HistoryStringComparison);
                 if (!inputUnchanged && _selectedIndex > -1)
                 {