Prints to find out what is wrong

Author: ManickaP

src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.cs

@@ -2216,6 +2216,7 @@ await LoopbackServerFactory.CreateClientAndServerAsync(async uri =>
                     // WinHTTP validates the input before opening connection whereas SocketsHttpHandler opens connection first and validates only when writing to the wire.
                     acceptConnection.SetResult(!IsWinHttpHandler);
                     var ex = await Assert.ThrowsAnyAsync<Exception>(() => client.SendAsync(request));
+                    Console.WriteLine($"Client exception: {ex}");
                     if (IsWinHttpHandler)
                     {
                         var fex = Assert.IsType<FormatException>(ex);

src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTestBase.cs

@@ -42,6 +42,7 @@ protected async Task IgnoreExceptions(Func<Task> func)
             catch (Exception ex)
             {
                 _output.WriteLine($"Ignored exception:{Environment.NewLine}{ex}");
+                Console.WriteLine($"Ignored exception:{Environment.NewLine}{ex}");
             }
         }