[Mono-list] Is this a common error that someone has a hint about?

[Maser, Dan]

  I'm using RHEL4 and I rebuilt my mono from the svn head today.  When I run my app (which was working a month ago) I get this fatal exception I've not seen before.  Does it look familiar to anyone?  If there are some ideas I'd try them before trying to make a test app to reproduce the problem and posting a bug.

** ERROR **: Opcode 'strlen' missing from machine description file.
aborting...
Stacktrace:

  at ININ.LogViewer.LogWindow.LogWindow_Activated (object,System.EventArgs) <0xffffffff>
  at ININ.LogViewer.LogWindow.LogWindow_Activated (object,System.EventArgs) <0x01ce8>
  at System.Windows.Forms.Form.OnActivated (System.EventArgs) <0x00044>
  at System.Windows.Forms.Form.OnActivatedInternal () <0x00015>
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Form.OnActivatedInternal () <0xffffffff>
  at System.Windows.Forms.MdiWindowManager.RaiseActivated () <0x00029>
  at System.Windows.Forms.Form.CreateHandle () <0x00437>
  at System.Windows.Forms.Control.CreateControl () <0x0007a>
  at System.Windows.Forms.Control.SetVisibleCore (bool) <0x0006f>
  at System.Windows.Forms.Form.SetVisibleCore (bool) <0x00210>
  at System.Windows.Forms.Control.set_Visible (bool) <0x00026>
  at System.Windows.Forms.Control.Show () <0x0000c>
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control.Show () <0xffffffff>
  at ININ.LogViewer.MDIMainForm.OpenFile (object,System.EventArgs) <0x001c7>
  at System.Windows.Forms.ToolStripItem.OnClick (System.EventArgs) <0x00044>
  at System.Windows.Forms.ToolStripButton.OnClick (System.EventArgs) <0x00034>
  at System.Windows.Forms.ToolStripItem.HandleClick (System.EventArgs) <0x00029>
  at System.Windows.Forms.ToolStripItem.FireEvent (System.EventArgs,System.Windows.Forms.ToolStripItemEventType) <0x0008e>
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.ToolStripItem.FireEvent (System.EventArgs,System.Windows.Forms.ToolStripItemEventType) <0xffffffff>
  at System.Windows.Forms.ToolStrip.OnMouseUp (System.Windows.Forms.MouseEventArgs) <0x0010b>
  at System.Windows.Forms.Control.WmLButtonUp (System.Windows.Forms.Message&) <0x000fe>
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message&) <0x001a2>
  at System.Windows.Forms.ScrollableControl.WndProc (System.Windows.Forms.Message&) <0x0000d>
  at System.Windows.Forms.ToolStrip.WndProc (System.Windows.Forms.Message&) <0x0000d>
  at System.Windows.Forms.Control/ControlWindowTarget.OnMessage (System.Windows.Forms.Message&) <0x00014>
  at System.Windows.Forms.Control/ControlNativeWindow.WndProc (System.Windows.Forms.Message&) <0x0001f>
  at System.Windows.Forms.NativeWindow.WndProc (intptr,System.Windows.Forms.Msg,intptr,intptr) <0x001be>
  at System.Windows.Forms.XplatUIX11.DispatchMessage (System.Windows.Forms.MSG&) <0x00023>
  at System.Windows.Forms.XplatUI.DispatchMessage (System.Windows.Forms.MSG&) <0x00014>
  at System.Windows.Forms.Application.RunLoop (bool,System.Windows.Forms.ApplicationContext) <0x0091f>
  at System.Windows.Forms.Application.Run (System.Windows.Forms.ApplicationContext) <0x0005e>
  at System.Windows.Forms.Application.Run (System.Windows.Forms.Form) <0x00028>
  at ININ.LogViewer.Program.Main (string[]) <0x001d4>
  at (wrapper runtime-invoke) ININ.LogViewer.Program.runtime_invoke_void_string[] (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        mono [0x806de3b]
        /lib/tls/libpthread.so.0 [0x8bca90]
        /lib/tls/libc.so.6(abort+0xe9) [0x67b289]
        /usr/lib/libglib-2.0.so.0(g_log+0) [0x982ebe]
        /usr/lib/libglib-2.0.so.0(g_log+0x32) [0x982ef0]
        mono [0x81f2d17]
        mono [0x8193e51]
        mono [0x819574d]
        mono [0x8196d81]
        mono [0x806e47a]
        [0x53a066]
        [0xd4217d]
        [0x595a436]
        [0x595a3ef]
        [0x595a37a]
        [0xd306c0]
        [0xcb6cc3]
        [0xf1b4c8]
        [0xd2ff61]
        [0xf1b427]
        [0x3b0a93d]
        [0x3b0a8ff]
        [0xd820e0]
        [0xd81efd]
        [0xd81e7d]
        [0xd81b22]
        [0xd4da3f]
        [0xd4d981]
        [0xd8144c]
        [0xd8119f]
        [0xf14213]
        [0xd31cce]
        [0xd35936]
        [0xf14065]
        [0xf14048]
        [0xf13567]
        [0xd41e24]
        [0xd41df5]
        [0xd2f7d8]
        [0xd2ee67]
        [0xd2eb49]
        [0xeb5465]
        [0xeb51e5]
        mono(mono_runtime_exec_main+0xcd) [0x80f5f65]
        mono(mono_runtime_run_main+0x1df) [0x80f62c3]
        mono(mono_main+0x1401) [0x805ad09]
        mono [0x805946b]
        /lib/tls/libc.so.6(__libc_start_main+0xd3) [0x666df3]
        mono(dl_iterate_phdr+0x171) [0x80593cd]


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