[DRE-maint] Bug#795046: ruby-parslet: FTBFS: undefined method `its'

[Chris West (Faux)]

Source: ruby-parslet
Version: 1.6.1-1
Severity: serious
Justification: fails to build from source
Tags: sid stretch
User: reproducible-builds at lists.alioth.debian.org
Usertags: ftbfs
X-Debbugs-CC: reproducible-builds at lists.alioth.debian.org

Dear Maintainer,

The package fails to build:

┌──────────────────────────────────────────────────────────────────────────────┐
│ Run tests for ruby2.1 from debian/ruby-tests.rake                            │
└──────────────────────────────────────────────────────────────────────────────┘

RUBYLIB=/ruby-parslet-1.6.1/debian/ruby-parslet/usr/lib/ruby/vendor_ruby:. rake2.1 -f debian/ruby-tests.rake
/usr/bin/ruby2.1 /usr/bin/rspec --pattern spec/\*\*\{,/\*/\*\*\}/\*_spec.rb
/usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:656:in `method_missing': undefined method `its' for RSpec::ExampleGroups::ParsletAtomsDSL::DeprecatedMethods::Absnt:Class (NoMethodError)
	from /ruby-parslet-1.6.1/spec/parslet/atoms/dsl_spec.rb:8:in `block (3 levels) in <top (required)>'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:363:in `module_exec'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:363:in `subclass'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:254:in `block in define_example_group_method'
	from /ruby-parslet-1.6.1/spec/parslet/atoms/dsl_spec.rb:6:in `block (2 levels) in <top (required)>'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:363:in `module_exec'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:363:in `subclass'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:254:in `block in define_example_group_method'
	from /ruby-parslet-1.6.1/spec/parslet/atoms/dsl_spec.rb:4:in `block in <top (required)>'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:363:in `module_exec'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:363:in `subclass'
	from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:254:in `block in define_example_group_method'
	from /usr/lib/ruby/vendor_ruby/rspec/core/dsl.rb:43:in `block in expose_example_group_alias'
	from /usr/lib/ruby/vendor_ruby/rspec/core/dsl.rb:82:in `block (2 levels) in expose_example_group_alias_globally'
	from /ruby-parslet-1.6.1/spec/parslet/atoms/dsl_spec.rb:3:in `<top (required)>'
	from /usr/lib/ruby/vendor_ruby/rspec/core/configuration.rb:1327:in `load'
...

Full build log:
https://reproducible.debian.net/rb-pkg/unstable/amd64/ruby-parslet.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_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)