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Here's the crash report in case it helps solving my problem:

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Ooh. Shiny.

Time: 2017-01-15 15:47
Description: Initializing game

java.lang.NoSuchFieldError: DEFAULT_BAKED_FORMAT
at net.minecraftforge.client.model.Attributes.<clinit>(Attributes.java:24)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:503)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:139)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:478)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraftforge.client.model.Attributes.<clinit>(Attributes.java:24)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:503)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:139)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:478)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.8.9
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 4053786888 bytes (3865 MB) / 4260102144 bytes (4062 MB) up to 4260102144 bytes (4062 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4g -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xms4096M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.19 Powered by Forge 11.15.1.1722 3 mods loaded, 3 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCH FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.1722.jar)
UCH Forge{11.15.1.1722} [Minecraft Forge] (forge-1.8.9-11.15.1.1722.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.2.0 - Build 10.18.10.3540' Renderer: 'Intel(R) HD Graphics 4600'
Launched Version: 1.8.9-forge1.8.9-11.15.1.1722
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 4600 GL version 4.2.0 - Build 10.18.10.3540, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz

Please tell me what's wrong, I'd like to be able to run minecraft with shaders.