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
Developer Community or GitHub 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.
I'm not sure what exactly happens, but when I had added Console.WriteLine (ex.ToString ()) to DotNetProject.cs, I've managed to get following stack trace:
System.TypeLoadException: A type load exception has occurred.
at MonoDevelop.Debugger.DebuggerEngine.CreateSession () [0x00006] in /build/buildd/monodevelop-latest-1336547739/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger/DebuggerEngine.cs:97
at MonoDevelop.Debugger.DebuggingService.InternalRun (MonoDevelop.Core.Execution.ExecutionCommand cmd, MonoDevelop.Debugger.DebuggerEngine factory, IConsole c) [0x0005d] in /build/buildd/monodevelop-latest-1336547739/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger/DebuggingService.cs:505
at MonoDevelop.Debugger.DebugExecutionHandler.Execute (MonoDevelop.Core.Execution.ExecutionCommand command, IConsole console) [0x00000] in /build/buildd/monodevelop-latest-1336547739/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger/DebugExecutionHandlerFactory.cs:70
at MonoDevelop.Debugger.DebugExecutionHandlerFactory.Execute (MonoDevelop.Core.Execution.ExecutionCommand command, IConsole console) [0x0000e] in /build/buildd/monodevelop-latest-1336547739/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger/DebugExecutionHandlerFactory.cs:51
at MonoDevelop.Projects.DotNetProject.DoExecute (IProgressMonitor monitor, MonoDevelop.Projects.ExecutionContext context, MonoDevelop.Projects.ConfigurationSelector configuration) [0x000b2] in /tmp/mdev/monodevelop-latest-1336547739/main/src/core/MonoDevelop.Core/MonoDevelop.Projects/DotNetProject.cs:1157
For some reason Mono doesn't even fill TypeName property of TypeLoadException so I cann't find the class that causes the exception.
Can you provide more info about the versions of MD and Mono, and your OS/distro?
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Mono JIT compiler version 22.214.171.124 (Debian 126.96.36.199-1ubuntu2)
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
LLVM: supported, not enabled.
GC: Included Boehm (with typed GC and Parallel Mark)
MonoDevelop from Git, configure options: .--prefix=/usr --profile=dist
Actually it works fine when I start it with make run, but gives me that exception when I try to use installed version.
Hm, when I've copied everything from main/build/bin to /usr/lib/monodevelop/bin, it works again.
I've found the issue: Mono.Cecil.Mdb.dll isn't installed at all and because of that MonoDevelop is unable to load debugger.
Solution: add Mono.Cecil.Mdb.dll to the list of files to be installed.
Looks like install targets got broken.
Yes, this was my bad. I missed the .Mdb library when switching to the cecil submodule. I only included Mono.Cecil.dll and Mono.Cecil.dll.mdb.
Fixed in master and 3.0-series.