Segfault if you offer an integer to HyperBuilder

[jeremywadsack]

Here's a simple repro:

builder = HyperBuilder.new(11)
builder.offer(4)

I would expect this to take "4" and record it as a value. That is, if I offer [1, 2, 3] to the builder I would expect to get an estimated cardinality of 3.

What actually happens is a segfault.

$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.4.0]

Process:         ruby [66977]
Path:            /Users/USER/*/ruby
Identifier:      ruby
Version:         ??? (???)
Code Type:       X86-64 (Native)
Parent Process:  bash [9136]

Date/Time:       2012-11-16 17:08:32.339 -0800
OS Version:      Mac OS X 10.7.5 (11G63)
Report Version:  9

Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Exception Type:  EXC_BAD_ACCESS (SIGABRT)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000009