FULL PRODUCT VERSION :
java -version
openjdk version "1.8.0_60"
OpenJDK Runtime Environment (build 1.8.0_60-b16)
OpenJDK 64-Bit Server VM (build 25.60-b16, mixed mode)

and other JDK

 java -version
openjdk version "1.8.0_45"
OpenJDK Runtime Environment (build 1.8.0_45-b14)
OpenJDK 64-Bit Server VM (build 25.45-b02, mixed mode)


FULL OS VERSION :
Fedora Linux x64, different version from F17-to F21

A DESCRIPTION OF THE PROBLEM :
At some point hotspot incorrectly inline functions,
option Option -XX:InlineSmallCode=0 does help.

See https://bugzilla.redhat.com/show_bug.cgi?id=1233827

THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: No

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run YY.java code
at some point you would get
k= rmoms=[D@4b1d6571 moms=[D@1b835480 r=[D@3549bca9
k= rmoms=[D@4f25b795 moms=[D@6fb365ed r=[D@6e950bcf
k= rmoms=null moms=null r=null
Exception in thread "main" java.lang.NullPointerException
        at YY.mulVV(YY.java:78)
        at YY.mulVV(YY.java:70)
        at YY.getX(YY.java:33)
        at YY.runTests(YY.java:14)
        at YY.main(YY.java:88)


EXPECTED VERSUS ACTUAL BEHAVIOR :
java -XX:InlineSmallCode=0 YY
y=6405.9478662121455


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
class YY {

    static final java.util.Random R=new java.util.Random(1);

    
    double runTests(final int ntests)
    {
double yy=0;
for(int k=0;k<ntests;k++)
{
final int d=R.nextInt(23)+3;
final double [] m=new double [d];
for(int j=0;j<d;j++) m[j]=R.nextDouble();
final double [] v=getX(m);
for(int j=0;j<v.length;j++) yy+=v[j];
}
return yy;
    }

    

public double [] getX(final double [] moms)
{
    final double [] r=new double [moms.length-1];
    final double [] rmoms=new double [moms.length];
    //System.err.println("INIT:rmoms="+rmoms+" moms="+moms+" r="+r);
    for(int k=0;k<r.length;k++)
    {
final double [] tmp=new double [k+1];
tmp[k]=1;
setxP(rmoms,tmp);
System.err.println("k="/*+k*/+" rmoms="+rmoms+" moms="+moms+" r="+r);
r[k]=mulVV(k+2,rmoms,moms); // Line 544 !!! Arguments are null !!!
    }
    return r;
}

public void setxP(final double [] r,final double [] x)
{
    setxP(x.length,r,x);
}

static final YY BASIS=new YY();

public void setxP(final int n,final double [] res,final double [] p)
{
    BASIS.setaxbP(n-1,res,p,1,0);
}

public void setaxbP(final int n,final double [] res,final double [] p,final double a,final double b)
{
    double r=p[n];
    res[n]=res[n+1]=0;
    for(int k=n;k>=0;k--)
    {
final double ar=a*r;
res[k+1]-=(k+1)*(ar);
res[k]+=(2*k+1)*(ar)+b*r;
if(k>0)
{
final double t=p[k-1];
res[k-1]=-k*(ar);
r=t;
}
    }
}

public static double mulVV(final int n,final double [] a,final double [] b)
{
    return mulVV(n,a,0,b,0);
}

public static double mulVV(final int n,final double [] a,final int off_a,final double [] b,final int off_b)
{
    double s=0;
    for(int i=n;--i>=0;)
    {
s+=a[i+off_a]*b[i+off_b];
    }
    return s;
}
    


    public static void main(String [] args)
    {
final int ntests=10000000;
final double y=new YY().runTests(ntests);
System.err.println("y="+y);
    }

}


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