https://bugs.winehq.org/show_bug.cgi?id=43425 Bug ID: 43425 Summary: 64-bit .NET application crashes with NullReferenceException Product: Wine Version: 2.12 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: blocker Priority: P2 Component: mscoree Assignee: wine-bugs(a)winehq.org Reporter: tjroamer(a)gmail.com Distribution: --- Created attachment 58791 --> https://bugs.winehq.org/attachment.cgi?id=58791 back trace of the bug I encountered a problem with the 64-bit .NET Framework: My C# program is very simple: Code: static void Main(string[] args) { System.Console.WriteLine("Hello world!"); Debug.WriteLine("Debug Hello world!"); } I installed the WINE-2.12 64-bit on CentOS 7 (3.10.0-514.21.1.el7.x86_64) and installed the .NET Framework 4.6.1 onto it. Before installing the .NET Framework, I removed wine-mono. I got the following error message when I tried to run the above program: Hello world! Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object. at System.Diagnostics.DiagnosticsConfiguration.Initialize() at System.Diagnostics.DiagnosticsConfiguration.get_IndentSize() at System.Diagnostics.TraceInternal.InitializeSettings() at System.Diagnostics.TraceInternal.WriteLine(String message) at ConsoleApplication3.Program.Main(String[] args) wine: Unhandled page fault on read access to 0x00000000 at address 0x1aa460fd (thread 0009), starting debugger... The problem is with the line "Debug.WriteLine(...)". However, the same application compiled with 32-bit works well. I found out that I got the similar error at other positions when I ran our in-house 64-bit .NET program, even if I don't use Debug.WriteLine(...), so I created the hello-world program to reproduce it. My final goal is: run our 64-bit .NET application on a 64-bit WINE with .NET Framework 4.6.1. -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.