Java Fatal error while loading modded minecraft


I am running the following and keep getting this error when trying to run Minecraft. I am told that this is a java error, not a Minecraft error but I have no idea what it means.

I am running Windows 10, 64-bit 24 GB ram (10 alotted to Minecraft) Radeon 7970 graphics card (drivers up to date) Intel 3570k CPU

The crash report can be found here (hs_err_pid7804.log):

The minecraft error log itself is here:

# A fatal error has been detected by the Java Runtime Environment:
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffdfdd22c3a, pid=7804, tid=0x00000000000042dc
# JRE version: Java(TM) SE Runtime Environment (8.0_171-b11) (build 1.8.0_171-b11)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.171-b11 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C  [ig7icd64.dll+0x22c3a]
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
# An error report file with more information is saved as:
# E:\Program Files\Minecraft\MultiMC\instances\Sevtech\minecraft\hs_err_pid7804.log
# If you would like to submit a bug report, please visit:
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
AL lib: (EE) alc_cleanup: 1 device not closed

Java bug reporting URL is down for maintenance.

My suspect is the Immersive Railroading mod. I works perfectly fine with a small number of mods but with as many as I have, it seems to cause a Java crash, not a Minecraft crash.

Their github is here: Removing Immersive Railroading results in being able to play the game.

NOTE: The crash specifically happens when creating a new world. I can load the Minecraft Main Screen just fine.

I am using these java arguments:

-XX:+UseG1GC -Dsun.rmi.dgc.server.gcInterval=2147483646 -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=42M -Dforge.forceNoStencil=true

Minimum memory allocation: 1024MB

Maximum memory allocation: 10480 MB

Permgen: 512MB

Can someone help me determine what the issue is? I kept a close eye on my ram usage and it doesn't get maxxed out. I ran memory tests and the sticks are fine with no memory leaks from drivers (less than 4gb being used in Windows when idle).

asked on Stack Overflow Jun 28, 2018 by Sweepster

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