Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
   at dje_qRW3Q4XFMDF787UEJVUMWW2UTQYPEPFSZCCE5WWUV58K3BVW8KNY72PNLDPZP4M7PUMCGM6EVJ8LGD_ejd.#=qHvgL5lXuVXvXrDEdHDEumR2aJlL0$dqJFqhTeDF97xI=(IntPtr #=q4AqCJd4ixQFagdtl1m3e66QIaijMsLaMrWn6nPv3imo=, IntPtr #=qKmfA9lBDWseiWE3Tm3V7Sw==, Int32& #=qmWayeQuiAzOqOLwzwvqeN9KXoAgEsKLzx$VSG2R2X1U=, IntPtr #=quIoyYLaUJlbFOJzlAyTopw==, Int32 #=qmX9BqCDU5Mhk8vWGs1wWEQ==)
   at #=qqGfaEwUpR9p4hATnFgYleEcB7W8Tx_Pq1TbKjorgfPk9uzlZyn3kkb_uGh0Q41x5.#=qxLKnFb5ODX$dzPZlupiENQ==()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
   at dje_qRW3Q4XFMDF787UEJVUMWW2UTQYPEPFSZCCE5WWUV58K3BVW8KNY72PNLDPZP4M7PUMCGM6EVJ8LGD_ejd.#=qKZxsdYoOSx1jGRbpqzOTDQ==(IntPtr #=qm8WAsYbOKgdzf7ZUIX6_dgcyjMaESMnxBUClCvwUljQ=, Int32 #=qf5kOwoxCFFyKC9ecn0G2iQ==, IntPtr #=qx859JVsPLEX8HoCHA_tK5KTTx89NZM9LzjUloAdVu1E=, Int32 #=qUSFLcaTCwsUftbtD2tQwEg==, Int32 #=qTlH5YWPJjc565Zw0lamDJA==, Int32 #=qYrcM_Oamn4LjE4vM0VvwQw==)
   at #=qqGfaEwUpR9p4hATnFgYleEcB7W8Tx_Pq1TbKjorgfPk9uzlZyn3kkb_uGh0Q41x5.#=qxLKnFb5ODX$dzPZlupiENQ==()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

SPOILER

"osu" (runs osu with high i/o priority, I did this because I thought I could get away with playing osu while waiting for things to compile )

#!/bin/sh
cd ~/music/osu!
exec ionice -c best-effort -n 0 -- wine32-osu osu!.exe "$@"

"wine32-osu" (runs something in osu's wineprefix)

#!/bin/sh
export WINEPREFIX="$HOME/.osu-wine" WINEARCH=win32
exec wine "$@"

1. Set your WINEPREFIX and WINEARCH. WINEPREFIX doesn't matter so long as you can write there, WINEARCH is win32. See the code box below.
2. Use winetricks to install .NET 4.0. (again, see code box below for this or any future steps).
   1. If wine asks to install mono, press cancel.
   2. Gecko doesn't hurt
   3. .NET 4.5 didn't work first time I tried it, but I got it working today.
3. If you have already got a recent installation of Osu! beta or cutting edge somewhere, you can stop here and just run it.
4. Use winecfg to turn on virtual desktop (Graphics -> Emulate a virtual desktop). This fixes an issue (for me at least) where the .NET 3.0 installer hangs on some desktop environments.
5. Use winetricks to install msxml3. It will save you a lot of hassle if you just do this right now. If not, there is a chance the dotnet35 install will tell you to download this dependency but it won't allow you to restart the install so you have to trash the WINEPREFIX.
6. Use winetricks to install dotnet35.
   1. Make sure no other wine programs in that WINEPREFIX are running, because winetricks will sometimes try to wait for those to finish.
   2. In one of my tries installing dotnet35 I got an error from wordpad. If you get this, OK through the error and terminate the wordpad process. I only got it once out of several tries though.
   3. This takes about 20 minutes, give or take.
   4. If it asks to restart, either button just does the same.
   5. You may want to move the virtual desktop to a different workspace while it's going, because at some point it starts focus stealing like mad.
7. Disable virtual desktop again, it's ugly
8. Install Osu! under wine using the default installer. Make sure that osu is *outside* of the WINEPREFIX. This isn't 100% necessary but I highly recommend it just in case you need to wipe the WINEPREFIX for some reason.
9. Switch release stream, maybe play partway through a map while you wait, restart osu when it's done. It should work on all release streams.

export WINEPREFIX="$HOME/.osu-wine" WINEARCH=win32  # If you use a different terminal to perform any of the commands, make sure you first run this command in it again
winetricks dotnet40
winecfg  # Enable virtual desktop here
winetricks msxml3
winetricks dotnet35
winecfg  # Disable it again
wine 'osu!install.exe'  # Install, change release stream, restart it

export WINEPREFIX="$HOME/.osu-wine" WINEARCH=win32
winetricks -q msxml3 dotnet40 dotnet35
wine 'osu!install.exe'

Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
   at dje_qT4JAE64656U6F7528URAXMA26UYKDPWAABJCS9TLJUAJNSSKSQVDASD9DPCSB332DLAZXSCC7TQTS_ejd.#=qAztGl3WxL5WK$wl7kFYPYpK$66G4C78Mmd74mb3mSVA=(IntPtr #=qRNUXKpxx1kVQHW8UMnXLf9j0H8qElIu6T5S3zvxG7eM=, IntPtr #=qJeAAuxP3J7VYqzsYYQlT0A==, Int32& #=qr2fl2PyBvqj3PdE5vIehHBdoF71db6oa1fJuIeX0u30=, IntPtr #=qAugOm0bU4oBG09LLlw6mpA==, Int32 #=qkW8xcaxDuOmymCZE3zIheQ==)
   at #=qA$KoEZ1Xw_2CRJrSP6Y0fArtSd$1EtfQlRo$XwPv8ImoGHGv42j11NKIaOUOMKTD.#=qfoMhIDH98Ogs1$r_gTI0fA==()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
   at dje_qYHMRNRSZEAEMLBASRFKHXFSWGLVAQZGBFFJHX4XTZBF5PJ697P5SJHWSA6KKJHDLETVXQSLJZEQAF_ejd.#=qnrqi41oRfAMDfTiofQlEfQ==(IntPtr #=qa9auRCTcgJuYyEKePeGOoCZTu_nWHytUEPopPdqqkb0=, Int32 #=qLnRG78H_t6X8xksvkmIW2g==, IntPtr #=qu2Io9cmajFUP$ucxbvKbRDlKjXTE5nx4SPxxCXR4JMw=, Int32 #=qSrFeTjY7k65VsdeOWu6S7g==, Int32 #=qBmjb7m3BxpYSzHdm_eSpjg==, Int32 #=qSB6c4zXYbGAQ0mQdNkUQ$A==)
   at #=qsLqbWp0v5TuESEh4yPHTTRPDnC78P0mrCTCgn1UlPXJTfkx_zz_TlULn5Nhot2LD.#=q5NqYgjcYM8gBpCiZEoGZUg==()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

1. Quick reset (I haven't reproduced it on the pause screen or with PF)
2. Video playing
3. Active slider (edit: might not actually be necessary? I think it's happened without it before)
4. (Bad) luck -- probably a race condition judging by the stack trace, but then again the top could be anything so I can't be sure
5. Some magic pixie dust, because it doesn't seem to happen on all video maps

Score_Under wrote:

Steps to reproduce:
0. Watch the video I linked, mostly just look at the end.
1. Download this map: Utada Hikaru - Beautiful World
2. Turn video on.
3. Play the first few seconds of the hardest difficulty, and start dragging the slider that I reset on in my video (the third one on the map). It's also possible, if a little trickier, to reproduce this on the first slider on the map.
4. Still holding the slider tap key, before the slider finishes, hold down quick reset too. It helps if you rebind quick reset to be near your tapping keys for this, though I tried mouse-only and still reproduced it.
This should take you about three attempts until it crashes. With a little luck it will crash first time.

1. Fix crash when using quick-retry on beatmaps with video. (smoogipooo)