Build: jdk 9 b125
OS: Oracle Linux 6.5/macosx 10.9

Steps:
1. Use format string %d, and integer i=1 as args
2. Invoke the method String.format(String format, Object... args)

Expected result:
the string is formatted as 1.

Actual result:
if set LC_ALL and LANG to en_US/zh_CN/de_DE, the result is 1, in ar_SA, result is garbled string.

Sample code:
public class test{
      public static void main(String[] args){
              int i=1;
              String actual = String.format("%d",i);
              System.out.println(actual);
      }
}

Additional information:
the sample code works as expected in latest 8u111 b02
this bug reproduces in 9 b110/b85