Console.Unix: fix window size not always being invalidated (#41317)

Ensure signal handlers are setup to invalidate cached values
for window size.

diff --git a/src/libraries/System.Console/src/System/ConsolePal.Unix.cs b/src/libraries/System.Console/src/System/ConsolePal.Unix.cs
index 017c55e..6393a06 100644 (file)
--- a/src/libraries/System.Console/src/System/ConsolePal.Unix.cs
+++ b/src/libraries/System.Console/src/System/ConsolePal.Unix.cs
@@ -1357,6 +1357,9 @@ namespace System
 
         private static void CheckTerminalSettingsInvalidated()
         {
+            // Register for signals that invalidate cached values.
+            EnsureConsoleInitialized();
+
             bool invalidateSettings = Interlocked.CompareExchange(ref s_invalidateCachedSettings, 0, 1) == 1;
             if (invalidateSettings)
             {