From 89ad38beae9693f29b9aa4c20bb7a55fb4977992 Mon Sep 17 00:00:00 2001
From: Andrew Schwartzmeyer <andschwa@microsoft.com>
Date: Fri, 5 Feb 2016 11:51:17 -0800
Subject: [PATCH] Guard prompt function

Fixes #485.
---
 src/Microsoft.PowerShell.Linux.Host/main.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/Microsoft.PowerShell.Linux.Host/main.cs b/src/Microsoft.PowerShell.Linux.Host/main.cs
index 8ffbe86611..dc263e217d 100644
--- a/src/Microsoft.PowerShell.Linux.Host/main.cs
+++ b/src/Microsoft.PowerShell.Linux.Host/main.cs
@@ -500,7 +500,16 @@ OPTIONS
             // the user calling "exit".
             while (!this.ShouldExit && this.myHost.Runspace != null)
             {
-                string prompt = Prompt(this.myHost.Runspace);
+                // If the prompt function failed for any reason, use a sane default
+                string prompt;
+                try
+                {
+                    prompt = Prompt(this.myHost.Runspace);
+                }
+                catch
+                {
+                    prompt = "PS> ";
+                }
 
                 this.myHost.UI.Write(ConsoleColor.White, ConsoleColor.Black, prompt);
                 string cmd = consoleReadLine.Read(this.myHost.Runspace);