jruby · Jan 23, 2018 · Jan 23, 2018 · Jan 23, 2018 · Jan 23, 2018 · Jan 23, 2018
diff --git a/core/src/main/java/org/jruby/RubyBignum.java b/core/src/main/java/org/jruby/RubyBignum.java
@@ -597,34 +597,30 @@ public IRubyObject idiv(ThreadContext context, long other) {
     /** rb_big_divmod
      *
      */
+    @Override
     @JRubyMethod(name = "divmod", required = 1)
     public IRubyObject divmod(ThreadContext context, IRubyObject other) {
-        if (!other.isNil() && other instanceof RubyFloat
-                && ((RubyFloat)other).getDoubleValue() == 0) {
-            throw context.runtime.newZeroDivisionError();
-        }
-
-        Ruby runtime = context.runtime;
-
         final BigInteger otherValue;
         if (other instanceof RubyFixnum) {
             otherValue = fix2big((RubyFixnum) other);
         } else if (other instanceof RubyBignum) {
             otherValue = ((RubyBignum) other).value;
         } else {
             if (other instanceof RubyFloat && ((RubyFloat)other).getDoubleValue() == 0) {
-                throw runtime.newZeroDivisionError();
+                throw context.runtime.newZeroDivisionError();
             }
             return coerceBin(context, sites(context).divmod, other);
         }
 
-        if (otherValue.signum() == 0) throw runtime.newZeroDivisionError();
+        if (otherValue.signum() == 0) throw context.runtime.newZeroDivisionError();
 
         BigInteger[] results = value.divideAndRemainder(otherValue);
         if ((value.signum() * otherValue.signum()) == -1 && results[1].signum() != 0) {
             results[0] = results[0].subtract(BigInteger.ONE);
             results[1] = otherValue.add(results[1]);
         }
+
+        Ruby runtime = context.runtime;
         return RubyArray.newArray(runtime, bignorm(runtime, results[0]), bignorm(runtime, results[1]));
     }
 
@@ -933,6 +929,15 @@ public final int compareTo(IRubyObject other) {
         return (int)coerceCmp(context, sites(context).op_cmp, other).convertToInteger().getLongValue();
     }
 
+    @Override
+    public boolean equals(Object other) {
+        if (other == this) return true;
+        if (other instanceof RubyBignum) {
+            return value.compareTo(((RubyBignum) other).value) == 0;
+        }
+        return false;
+    }
+
     /** rb_big_cmp
      *
      */
@@ -1002,6 +1007,11 @@ public RubyFixnum hash() {
         return getRuntime().newFixnum(value.hashCode());
     }
 
+    @Override
+    public int hashCode() {
+        return value.hashCode();
+    }
+
     /** rb_big_to_f
      *
      */