Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
GitHub or Developer Community with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
public object Field1;
public int Field2;
public static void Main()
var a = new Data();
a.Field1 = new object();
Expected result: TypeLoadException: Could not load type Test.Data' from assembly 'Test, Version=18.104.22.168, Culture=neutral, PublicKeyToken=null' because it contains an object field at offset 0 that is incorrectly aligned or overlapped by a non-object field.
Actual result: Code runs and prints an integer which is probably object's address
By default mono does not verify that assemblies are correct.
Run mono with the --verify-all option to get (the admittedly bad) error message:
System.TypeLoadException: Error verifying Program:Main (): Could not load type .Data at 0x0000
[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeLoadException: Error verifying Program:Main (): Could not load type .Data at 0x0000