[Reproducible-builds] Bug#794165: FTBFS: Distribution::Binomial singleton should respond to #exact_p_value fails

[Chris West (Faux)]

Source: ruby-distribution
Version: 0.7.0+dfsg-1
Severity: serious
Tags: sid
Justification: fails to build from source
User: reproducible-builds at lists.alioth.debian.org
Usertags: ftbfs

Dear Maintainer,

The package fails to build:

......F....*....F*...................FF.......................F....*.....................................................*..*..F..............

Pending: (Failures listed here are expected and do not affect your suite's status)

  1) Distribution::Binomial singleton should respond to #exact_p_value
     # No exact_p_value
     Failure/Error: @engine.should respond_to(:exact_p_value)
       expected Distribution::Binomial to respond to :exact_p_value
     # ./spec/binomial_spec.rb:52:in `block (3 levels) in <top (required)>'

  2) Distribution::Binomial Distribution::Binomial::Ruby_ should return correct p_value for n<=100
     # Can't calculate with precision x using p
     Failure/Error: p_value.should eq(x), "For p_value(#{cdf},#{n},#{pr}) expected #{x}, obtained #{p_value}"
       For p_value(0.07812690734863297,10,0.75) expected 5, obtained 6
     # ./spec/binomial_spec.rb:91:in `block (6 levels) in <top (required)>'
     # ./spec/binomial_spec.rb:87:in `each'
     # ./spec/binomial_spec.rb:87:in `block (5 levels) in <top (required)>'
     # ./spec/binomial_spec.rb:86:in `each'
     # ./spec/binomial_spec.rb:86:in `block (4 levels) in <top (required)>'
     # ./spec/binomial_spec.rb:85:in `each'
     # ./spec/binomial_spec.rb:85:in `block (3 levels) in <top (required)>'

... and others.

Full build log:
https://reproducible.debian.net/rb-pkg/unstable/amd64/ruby-distribution.html

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.19.0-23-generic (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)