제가  다빗님이 올리신 모던 워페어모드를 하고 화살표를 누르자 튕겼어요 파일 가보니 crash-reports 라고써져있는 파일에들어가니  문서가 있어서 클릭해보니 이런 내용이 드라구요 

---- Minecraft Crash Report ----

WARNING: coremods are present:

  weaponlib (mw-1.11.7.7_mc1.12.2 (1).jar)

Contact their authors BEFORE contacting forge

// My bad.

Time: 3/18/20 10:57 PM

Description: Rendering item

java.lang.IllegalStateException: Not building!

    at net.minecraft.client.renderer.BufferBuilder.func_178977_d(BufferBuilder.java:537)

    at net.minecraft.client.renderer.Tessellator.func_78381_a(SourceFile:21)

    at com.vicmatskiv.weaponlib.compatibility.CompatibleWeaponRenderer.func_188616_a(CompatibleWeaponRenderer.java:137)

    at net.minecraftforge.client.ForgeHooksClient.renderLitItem(ForgeHooksClient.java:653)

    at net.minecraft.client.renderer.RenderItem.func_191967_a(RenderItem.java:118)

    at net.minecraft.client.renderer.RenderItem.func_191961_a(RenderItem.java:106)

    at net.minecraft.client.renderer.RenderItem.func_180454_a(RenderItem.java:149)

    at net.minecraft.client.renderer.RenderItem.func_191962_a(RenderItem.java:308)

    at net.minecraft.client.renderer.RenderItem.func_184391_a(RenderItem.java:347)

    at net.minecraft.client.renderer.RenderItem.func_180450_b(RenderItem.java:336)

    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147051_a(GuiContainerCreative.java:922)

    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_146976_a(GuiContainerCreative.java:758)

    at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:75)

    at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(InventoryEffectRenderer.java:51)

    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73863_a(GuiContainerCreative.java:643)

    at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:396)

    at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1124)

    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1119)

    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)

    at net.minecraft.client.main.Main.main(SourceFile:123)

    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:497)

    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 --

Thread: Client thread

Stacktrace:

    at net.minecraft.client.renderer.BufferBuilder.func_178977_d(BufferBuilder.java:537)

    at net.minecraft.client.renderer.Tessellator.func_78381_a(SourceFile:21)

    at com.vicmatskiv.weaponlib.compatibility.CompatibleWeaponRenderer.func_188616_a(CompatibleWeaponRenderer.java:137)

    at net.minecraftforge.client.ForgeHooksClient.renderLitItem(ForgeHooksClient.java:653)

    at net.minecraft.client.renderer.RenderItem.func_191967_a(RenderItem.java:118)

    at net.minecraft.client.renderer.RenderItem.func_191961_a(RenderItem.java:106)

    at net.minecraft.client.renderer.RenderItem.func_180454_a(RenderItem.java:149)

    at net.minecraft.client.renderer.RenderItem.func_191962_a(RenderItem.java:308)

-- Item being rendered --

Details:

    Item Type: com.vicmatskiv.weaponlib.Weapon@43918bef

    Registry Name: mw:m16a4

    Item Aux: 0

    Item NBT: null

    Item Foil: false

Stacktrace:

    at net.minecraft.client.renderer.RenderItem.func_184391_a(RenderItem.java:347)

    at net.minecraft.client.renderer.RenderItem.func_180450_b(RenderItem.java:336)

    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147051_a(GuiContainerCreative.java:922)

    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_146976_a(GuiContainerCreative.java:758)

    at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:75)

    at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(InventoryEffectRenderer.java:51)

    at net.minecraft.client.gui.inventory.GuiContainerCreative.func_73863_a(GuiContainerCreative.java:643)

    at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:396)

-- Screen render details --

Details:

    Screen name: net.minecraft.client.gui.inventory.GuiContainerCreative

    Mouse location: Scaled: (326, 15). Absolute: (1307, 956)

    Screen size: Scaled: (480, 255). Absolute: (1920, 1017). Scale factor of 4

-- Affected level --

Details:

    Level name: MpServer

    All players: 1 total; [EntityPlayerSP['Bosstuba412'/59, l='MpServer', x=1018.50, y=4.00, z=-266.50]]

    Chunk stats: MultiplayerChunkCache: 530, 530

    Level seed: 0

    Level generator: ID 01 - flat, ver 0. Features enabled: false

    Level generator options: 

    Level spawn location: World: (1015,4,-268), Chunk: (at 7,0,4 in 63,-17; contains blocks 1008,0,-272 to 1023,255,-257), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)

    Level time: 719 game time, 719 day time

    Level dimension: 0

    Level storage version: 0x00000 - Unknown?

    Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)

    Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false

    Forced entities: 39 total; [EntitySlime['슬라임'/33793, l='MpServer', x=946.96, y=4.00, z=-188.42], EntitySlime['슬라임'/53636, l='MpServer', x=983.67, y=4.04, z=-320.28], EntitySlime['슬라임'/10763, l='MpServer', x=968.68, y=4.00, z=-306.24], EntityHorse['말'/18507, l='MpServer', x=998.87, y=4.00, z=-214.78], EntityHorse['말'/18508, l='MpServer', x=1002.84, y=4.00, z=-214.88], EntitySlime['슬라임'/69709, l='MpServer', x=1059.99, y=4.00, z=-275.95], EntityHorse['말'/18509, l='MpServer', x=992.50, y=4.00, z=-216.50], EntitySlime['슬라임'/4750, l='MpServer', x=1056.65, y=4.04, z=-312.35], EntityCow['소'/18510, l='MpServer', x=990.35, y=4.00, z=-220.85], EntityCustomMob10000['entity.bandit1.name'/23003, l='MpServer', x=964.75, y=4.00, z=-262.50], EntityCustomMob10000['entity.bandit1.name'/39963, l='MpServer', x=994.53, y=4.00, z=-327.26], EntityChicken['닭'/18463, l='MpServer', x=972.50, y=4.00, z=-190.50], EntitySlime['슬라임'/39583, l='MpServer', x=959.05, y=4.27, z=-285.08], EntityChicken['닭'/18464, l='MpServer', x=973.50, y=4.00, z=-195.50], EntityChicken['닭'/18465, l='MpServer', x=977.14, y=4.00, z=-186.74], EntitySlime['슬라임'/21025, l='MpServer', x=1084.27, y=4.08, z=-272.13], EntityPlayerSP['Bosstuba412'/59, l='MpServer', x=1018.50, y=4.00, z=-266.50], EntityCow['소'/18466, l='MpServer', x=970.50, y=4.00, z=-186.50], EntityCow['소'/18467, l='MpServer', x=994.50, y=4.00, z=-344.50], EntityCow['소'/18468, l='MpServer', x=997.50, y=4.00, z=-340.50], EntitySlime['슬라임'/42341, l='MpServer', x=949.21, y=4.12, z=-197.92], EntityChicken['닭'/18471, l='MpServer', x=969.14, y=4.00, z=-314.22], EntityPig['돼지'/18472, l='MpServer', x=970.54, y=4.00, z=-312.33], EntitySlime['슬라임'/2792, l='MpServer', x=942.40, y=4.00, z=-201.53], EntityCow['소'/18473, l='MpServer', x=965.50, y=4.00, z=-309.50], EntityCow['소'/18474, l='MpServer', x=966.50, y=4.00, z=-310.50], EntitySheep['양'/18475, l='MpServer', x=1010.75, y=4.00, z=-196.63], EntitySheep['양'/18476, l='MpServer', x=1008.50, y=4.00, z=-201.50], EntityChicken['닭'/18477, l='MpServer', x=1009.50, y=4.00, z=-195.50], EntityChicken['닭'/18478, l='MpServer', x=1017.13, y=4.00, z=-188.86], EntitySlime['슬라임'/43889, l='MpServer', x=1050.74, y=4.61, z=-188.65], EntityChicken['닭'/18483, l='MpServer', x=958.50, y=4.00, z=-242.50], EntitySheep['양'/18484, l='MpServer', x=945.80, y=4.00, z=-243.58], EntitySheep['양'/18485, l='MpServer', x=953.57, y=4.00, z=-244.70], EntityPig['돼지'/18486, l='MpServer', x=951.77, y=4.00, z=-244.30], EntityCow['소'/18488, l='MpServer', x=958.50, y=4.00, z=-320.50], EntityCow['소'/18489, l='MpServer', x=958.50, y=4.00, z=-321.50], EntityCow['소'/18490, l='MpServer', x=958.50, y=4.00, z=-322.50], EntityCow['소'/18491, l='MpServer', x=960.50, y=4.00, z=-322.50]]

    Retry entities: 0 total; []

    Server brand: fml,forge

    Server type: Integrated singleplayer server

Stacktrace:

    at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:420)

    at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)

    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:419)

    at net.minecraft.client.main.Main.main(SourceFile:123)

    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:497)

    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --

Details:

    Minecraft Version: 1.12.2

    Operating System: Windows 10 (amd64) version 10.0

    Java Version: 1.8.0_51, Oracle Corporation

    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation

    Memory: 485487192 bytes (462 MB) / 1073741824 bytes (1024 MB) up to 4294967296 bytes (4096 MB)

    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M

    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

    FML: MCP 9.42 Powered by Forge 14.23.5.2847 5 mods loaded, 5 mods active

    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State  | ID        | Version      | Source                        | Signature |

    |:------ |:--------- |:------------ |:----------------------------- |:--------- |

    | LCHIJA | minecraft | 1.12.2       | minecraft.jar                 | None      |

    | LCHIJA | mcp       | 9.42         | minecraft.jar                 | None      |

    | LCHIJA | FML       | 8.0.99.99    | forge-1.12.2-14.23.5.2847.jar | None      |

    | LCHIJA | forge     | 14.23.5.2847 | forge-1.12.2-14.23.5.2847.jar | None      |

    | LCHIJA | mw        | 1.11.7.7     | mw-1.11.7.7_mc1.12.2 (1).jar  | None      |

    Loaded coremods (and transformers): 

weaponlib (mw-1.11.7.7_mc1.12.2 (1).jar)

  com.vicmatskiv.weaponlib.core.WeaponlibClassTransformer

    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 432.00' Renderer: 'GeForce GTX 650 Ti/PCIe/SSE2'

    Launched Version: 1.12.2-forge1.12.2-14.23.5.2847

    LWJGL: 2.9.4

    OpenGL: GeForce GTX 650 Ti/PCIe/SSE2 GL version 4.6.0 NVIDIA 432.00, NVIDIA Corporation

    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: Yes

    Is Modded: Definitely; Client brand changed to 'fml,forge'

    Type: Client (map_client.txt)

    Resource Packs: 

    Current Language: 한국어 (대한민국)

    Profiler Position: N/A (disabled)

    CPU: 2x Intel(R) Pentium(R) CPU G3420 @ 3.20GHz 

이거해결법좀요;;;;