I confirmed this bug happen today after 2 days of offline activity.
updated on osume updater using test build..
broken on auto-converted maps and mania-specific also (used Lite Show Magic - Crack Traxxxx beatmap as sample)
and when open up the editor for mania-specific beatmap, it triggers an error which return osu to exit.
and here is the error. might you can debug it.
System.NullReferenceException: Object reference not set to an instance of an object.
at #Ei.#Ii.#RQ(#qj , Int32 , Int32 , Boolean )
at #Ei.#Ii.#6O()
at osu.GameModes.Edit.Editor.#6O()
at osu.GameModes.Edit.Editor.#Ms()
at #rb.#xb.#Ms()
at #1h.#0h.#Ms()
at #rb.#xb.#7s()
at #rb.#xb.#it(Object , EventArgs )
at #rb.#Bb.#Dt()
at #rb.#Rb.#Sv(Object , EventArgs )
at System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FDoIdle(Int32 grfidlef)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at #rb.#Rb.#ot()
at #rb.#xb.#ot()
at #1h.#np.#Iwb(String , Boolean )