In any of the 1.9 versions, loading a world or connecting to a server causes it to crash immediately. I've tried updating my graphics driver and my Java, and I've reinstalled MC a few times. Please find console output below and error log attached.

Completely ignored arguments: [--nativeLauncherVersion, 301]
[10:59:16] [Client thread/INFO]: Setting user: redacted
[10:59:17] [Client thread/INFO]: LWJGL Version: 2.9.4
[10:59:18] [Client thread/INFO]: Reloading ResourceManager: Default
[10:59:18] [Sound Library Loader/INFO]: Starting up SoundSystem...
[10:59:18] [Thread-5/INFO]: Initializing LWJGL OpenAL
[10:59:18] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[10:59:19] [Thread-5/INFO]: OpenAL initialized.
[10:59:19] [Sound Library Loader/INFO]: Sound engine started
[10:59:20] [Client thread/INFO]: Created: 1024x512 textures-atlas
[10:59:25] [Server thread/INFO]: Starting integrated minecraft server version 1.9.4
[10:59:25] [Server thread/INFO]: Generating keypair
[10:59:25] [Server thread/INFO]: Preparing start region for level 0
[10:59:26] [Server thread/INFO]: Preparing spawn area: 33%
[10:59:27] [Server thread/INFO]: Changing view distance to 12, from 10
[10:59:27] [Server thread/INFO]: kwekonxas[local:E:8a915c76] logged in with entity id 38 at (269.4623493984468, 66.0, 632.9331962378956)
[10:59:27] [Server thread/INFO]: kwekonxas joined the game
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1. A fatal error has been detected by the Java Runtime Environment:
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2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffce58d6637, pid=10588, tid=12504
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3. JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
4. Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
5. Problematic frame:
6. C [ig9icd64.dll+0x16637]
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7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
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8. An error report file with more information is saved as:
9. C:\Users\alex\AppData\Roaming\.minecraft\hs_err_pid10588.log
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10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
12. The crash happened outside the Java Virtual Machine in native code.
13. See problematic frame for where to report the bug.
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    AL lib: (EE) alc_cleanup: 1 device not closed
    Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release