Comment 5 for bug 570979

I get the same error, only on a normal ASP.Net application when trying to a simple debug ASP.NET page.

Steps to reproduce:
1) Startup project with ASP.Net debugging without any breakpoints defined
2) Switch back to monodevelop and try to set a breakpoint on a line of code
Result: error message:

Mono.Debugger.TargetMemoryException: Cannot read 4 bytes from target memory at address 0xffffffff

Server stack trace:
  at Mono.Debugger.Backend.Inferior.read_buffer (TargetAddress address, Int32 size) [0x00047] in /build/buildd/mono-debugger-2.4.3/backend/Inferior.cs:884
  at Mono.Debugger.Backend.Inferior.ReadInteger (TargetAddress address) [0x0000c] in /build/buildd/mono-debugger-2.4.3/backend/Inferior.cs:919
  at Mono.Debugger.Backend.Inferior.ReadAddress (TargetAddress address) [0x00020] in /build/buildd/mono-debugger-2.4.3/backend/Inferior.cs:944
  at Mono.Debugger.Architectures.Architecture_I386.GetLMF (Mono.Debugger.Backend.ThreadServant thread, Mono.Debugger.TargetMemoryAccess memory, Mono.Debugger.TargetAddress& lmf_address) [0x000d0] in /build/buildd/mono-debugger-2.4.3/backend/arch/Architecture_I386.cs:544
  at Mono.Debugger.Backend.SingleSteppingEngine+<ManagedCallback>c__AnonStorey1E.<>m__23 (Mono.Debugger.Thread , System.Object ) [0x00135] in /build/buildd/mono-debugger-2.4.3/backend/SingleSteppingEngine.cs:2143
  at Mono.Debugger.Backend.SingleSteppingEngine+<Invoke>c__AnonStorey1D.<>m__22 (Mono.Debugger.Thread , System.Object ) [0x00000] in /build/buildd/mono-debugger-2.4.3/backend/SingleSteppingEngine.cs:2095
  at Mono.Debugger.Backend.SingleSteppingEngine.SendCommand (Mono.Debugger.TargetAccessDelegate target) [0x00022] in /build/buildd/mono-debugger-2.4.3/backend/SingleSteppingEngine.cs:676
  at Mono.Debugger.Backend.SingleSteppingEngine.Invoke (Mono.Debugger.TargetAccessDelegate func, System.Object data) [0x0001b] in /build/buildd/mono-debugger-2.4.3/backend/SingleSteppingEngine.cs:2094
  at Mono.Debugger.Backend.ThreadManager.engine_thread_main () [0x00154] in /build/buildd/mono-debugger-2.4.3/backend/ThreadManager.cs:359

Exception rethrown at [0]:

  at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke (System.Runtime.Remoting.Proxies.RealProxy rp, IMessage msg, System.Exception& exc, System.Object[]& out_args) [0x00000]

I'm running Lucid Lynx with all the latest software as installed via the ubuntu repositories.
monodevelop 2.2.1