Numeric#step yields Floats instead of Integers #5078
Description
Environment
$ jruby -v
jruby 9.1.15.0 (2.3.3) 2017-12-07 929fde8 Java HotSpot(TM) 64-Bit Server VM 25.40-b25 on 1.8.0_40-b27 +jit [darwin-x86_64]
$ uname -a
Darwin Jankos-MacBook-Pro-2.local 17.4.0 Darwin Kernel Version 17.4.0: Sun Dec 17 09:19:54 PST 2017; root:xnu-4570.41.2~1/RELEASE_X86_64 x86_64
Expected Behavior
When I call Numeric#step on an Integer with an Integer step, MRI yields Integers:
# with default step of 1
1.step.first(5)
#=> [1, 2, 3, 4, 5]
# with explicit step
1.step(by: 2).first(5)
#=> [1, 3, 5, 7, 9]On the other hand, when either the receiver or the step is a Float, MRI yields Floats:
# with default step of 1
1.0.step.first(5)
#=> [1.0, 2.0, 3.0, 4.0, 5.0]
# with explicit step
1.step(by: 1.0).first(5)
#=> [1.0, 2.0, 3.0, 4.0, 5.0]Actual Behavior
On JRuby Numeric#step yields Floats regardless of whether the receiver and step are Integers or Floats:
1.step.first(5)
#=> [1.0, 2.0, 3.0, 4.0, 5.0]
1.step(by: 2).first(5)
#=> [1.0, 3.0, 5.0, 7.0, 9.0]