FULL PRODUCT VERSION :
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)


FULL OS VERSION :
Linux N042 4.10.0-37-generic #41~16.04.1-Ubuntu SMP Fri Oct 6 22:42:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fe05160fd22, pid=1101, tid=1102
#
# JRE version: Java(TM) SE Runtime Environment (9.0+11) (build 9.0.1+11)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (9.0.1+11, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# J 210 c2 JavaBug.formatPos(I)Ljava/lang/String; (97 bytes) @ 0x00007fe05160fd22 [0x00007fe05160fca0+0x0000000000000082]
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %P" (or dumping to /home/mbu/tmp/JavaBug/core.1101)
#
# An error report file with more information is saved as:
# /home/mbu/tmp/JavaBug/hs_err_pid1101.log
Could not load hsdis-amd64.so; library not loadable; PrintAssembly is disabled
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#


THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: No

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

REGRESSION. Last worked in version 8u152

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile the demo code and run it.
The JCM crashes after about 2500 iterations. Sometimes earlier, sometimes later.

EXPECTED VERSUS ACTUAL BEHAVIOR :
No SIGSEGV
REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class JavaBug {
  public static void main(String[] args) {
    for (int i = 0; i < 1000000; i++) {
      System.out.println(i);
      String foo = formatPos(i);
      }
    }

    private static String formatPos( int p )
    {
      boolean negative = p < 0;
      if ( negative )
        p = -p;
      char[] ac = new char[12];
      int i = 11;
      while (p != 0 || i > 3)
      {
        ac[i--] = (char) ( '0' + ( p % 10 ) );
        p /= 10;
        if ( i == 5 )
          ac[i--] = '.';
      }
      if ( negative )
        ac[i--] = '-';
      return new String( ac, i + 1, 11 - i );
  }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Java 8