Whenever I try to open a world, or join a server, it closes my Minecraft, (doesn't actually make a crash report, just an "error report."). I did some digging in the Game Output, and it said that I had a missing sound effect, a "snowman ambient." I tried updating Java, redownloading the snapshot. Here's the game output:

Completely ignored arguments: [--nativeLauncherVersion, 286]
[17:52:06] [Client thread/INFO]: Setting user: TheHappiestApple
[17:52:06] [Client thread/INFO]: (Session ID is token:7ef3dd88c6354fd3ad3a4101a8b799b2:19095e3950b6423d95517d6208352d97)
[17:52:08] [Client thread/INFO]: LWJGL Version: 2.9.4
[17:52:09] [Client thread/INFO]: Reloading ResourceManager: Default
[17:52:09] [Client thread/WARN]: Missing sound for event: minecraft:entity.snowman.ambient
[17:52:09] [Sound Library Loader/INFO]: Starting up SoundSystem...
[17:52:09] [Thread-5/INFO]: Initializing LWJGL OpenAL
[17:52:09] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[17:52:10] [Thread-5/INFO]: OpenAL initialized.
[17:52:10] [Sound Library Loader/INFO]: Sound engine started
[17:52:11] [Client thread/INFO]: Created: 1024x512 textures-atlas
[17:53:12] [Client thread/INFO]: Connecting to mineblox.zapto.org, 26260
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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=0x00007ff990d62177, pid=3328, tid=8180
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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 [ig75icd64.dll+0x12177]
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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\Trey\AppData\Roaming\.minecraft\hs_err_pid3328.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