ADDITIONAL SYSTEM INFORMATION :
Intel i7-8650u 32GB
Windows 10
OpenJDK 14.0.2

A DESCRIPTION OF THE PROBLEM :
I have a very small code:

  public static void main(String[] args) {
    int n = 4096;
    long[] data = new long[n * n];

    for (int k = 0; k < n; k++) {
      IntStream.range(0, n).forEach(j -> {
        for (int i = 0; i < n; i++)
          data[j * n + i]++;
      });
    }
  }

which has the following output:

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffd01641aee, pid=27584, tid=15100
#
# JRE version: OpenJDK Runtime Environment (14.0.2+12) (build 14.0.2+12-46)
# Java VM: OpenJDK 64-Bit Server VM (14.0.2+12-46, mixed mode, sharing, tiered, compressed oops, g1 gc, windows-amd64)
# Problematic frame:
# V  [jvm.dll+0x6b1aee]
#
# No core dump will be written. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\elszszo\git\eulerproject\hs_err_pid27584.log
#
# Compiler replay data is saved as:
# C:\Users\elszszo\git\eulerproject\replay_pid27584.log
#
# If you would like to submit a bug report, please visit:
#   https://bugreport.java.com/bugreport/crash.jsp
#

If I remove either the outer loop (k), or if I use only j*n or i or j as the array index in the increment line instead of the composite j*n + i , it runs without any issue.

REGRESSION : Last worked in version 8u261

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Just execute the following method included

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should be executed without jre crash, with no output.
ACTUAL -
jre crash:

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffd01641aee, pid=27584, tid=15100
#
# JRE version: OpenJDK Runtime Environment (14.0.2+12) (build 14.0.2+12-46)
# Java VM: OpenJDK 64-Bit Server VM (14.0.2+12-46, mixed mode, sharing, tiered, compressed oops, g1 gc, windows-amd64)
# Problematic frame:
# V  [jvm.dll+0x6b1aee]
#
# No core dump will be written. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\elszszo\git\eulerproject\hs_err_pid27584.log
#
# Compiler replay data is saved as:
# C:\Users\elszszo\git\eulerproject\replay_pid27584.log
#
# If you would like to submit a bug report, please visit:
#   https://bugreport.java.com/bugreport/crash.jsp
#


---------- BEGIN SOURCE ----------
  @Test
  public void test() {
    int n = 4096;
    long[] data = new long[n * n];

    for (int k = 0; k < n; k++) {
      IntStream.range(0, n).forEach(j -> {
        for (int i = 0; i < n; i++)
          data[j * n + i]++;
      });
    }
  }

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
if I replace the Instream with a conservative for-loop, it works.

FREQUENCY : always