Bug 2773 - Console.WriteLine (null) crashes
Summary: Console.WriteLine (null) crashes
Alias: None
Product: Android
Classification: Xamarin
Component: BCL Class Libraries ()
Version: 4.0
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Jonathan Pryor
Depends on:
Reported: 2012-01-08 12:22 UTC by Jonathan Pobst
Modified: 2014-03-31 03:49 UTC (History)
4 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Jonathan Pobst 2012-01-08 12:22:03 UTC
The following code:

string a = null;
Console.WriteLine (a);

crashes with:

I/MonoDroid(26689): UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object

I/MonoDroid(26689): at System.IO.LogcatTextWriter.Write (string) <0x00048>

I/MonoDroid(26689): at System.IO.TextWriter.WriteLine (string) <0x00023>

I/MonoDroid(26689): at System.IO.SynchronizedWriter.WriteLine (string) <0x0005b>

I/MonoDroid(26689): at System.Console.WriteLine (string) <0x0002f>

I/MonoDroid(26689): at MonoAndroidApplication10.Activity1.OnCreate (Android.OS.Bundle) <0x0004f>

I/MonoDroid(26689): at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (intptr,intptr,intptr) <0x00057>

I/MonoDroid(26689): at (wrapper dynamic-method) object.185fa990-56b8-4b26-9a56-d6f8944d43dd (intptr,intptr,intptr) <0x00033>

E/mono    (26689): 

E/mono    (26689): Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object

E/mono    (26689):   at System.IO.LogcatTextWriter.Write (System.String s) [0x00000] in <filename unknown>:0 

E/mono    (26689):   at System.IO.TextWriter.WriteLine (System.String value) [0x00000] in <filename unknown>:0 

E/mono    (26689):   at System.IO.SynchronizedWriter.WriteLine (System.String value) [0x00000] in <filename unknown>:0 

E/mono    (26689):   at System.Console.WriteLine (System.String value) [0x00000] in <filename unknown>:0 

E/mono    (26689):   at MonoAndroidApplication10.Activity1.OnCreate (Android.OS.Bundle bundle) [0x00000] in <filename unknown>:0 

E/mono    (26689):   at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (IntPtr jnienv, IntPtr native__this, IntPtr native_savedInstanceState) [0x00000] in <filename unknown>:0 

E/mono    (26689):   at (wrapper dynamic-method) object:185fa990-56b8-4b26-9a56-d6f8944d43dd (intptr,intptr,intptr)

I/ActivityManager(   97): Process MonoAndroidApplication10.MonoAndroidApplication10 (pid 26689) has died.
Comment 1 Miguel de Icaza [MSFT] 2012-01-08 16:33:30 UTC
This is probably the new Console redirector that sends the output to he ADB log from JonP
Comment 2 Atsushi Eno 2012-03-29 05:24:53 UTC
Comment 3 Nischal 2014-03-31 03:49:04 UTC
We have checked and able to build and deploy android applications successfully.

Environment Info:
Xamarin Studio
Version 4.2.4 (build 266) 
Build Information
Git revision: 57fa6b7639703775ae1d5c46536e42ab424cb177
Xamarin addins: eee141c29724a19529e77b8e743086d95b29f5ba
Xamarin.Android 4.13.0-144 (MAC)
Xamarin.Android 4.13.0-04 (Win)