MultilineIfThen raising NoMethodError `source_buffer' for nil:NilClass

[yaauie]

Unfortunately I can't provide more than this stack trace at the moment; this is occurring in many places, and my brief attempts to isolate the offending code (e.g., one offending file only has one if statement, so I extracted it) have not reproduced the exception.

An error occurred while MultilineIfThen cop was inspecting /Users/yaauie/projects/scrubbed/lib/scrubbed.rb.
Errors are usually caused by RuboCop bugs.
Please, report your problems to RuboCop's issue tracker.
Mention the following information in the issue report:
0.9.0 (using Parser 2.0.0.beta9, running on ruby 1.9.3 x86_64-darwin12.2.1)

With the following backtrace:

Scanning /Users/yaauie/projects/scrubbed/lib/scrubbed.rb
An error occurred while MultilineIfThen cop was inspecting /Users/yaauie/projects/scrubbed/lib/scrubbed.rb.
undefined method `source_buffer' for nil:NilClass
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cop/style/if_then_else.rb:53:in `offending_line'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cop/style/if_then_else.rb:21:in `check'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cop/style/if_then_else.rb:9:in `on_if'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:239:in `process'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:255:in `block in process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `map'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/parser-2.0.0.beta9/lib/parser/ast/processor.rb:6:in `process_regular_node'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:239:in `process'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/parser-2.0.0.beta9/lib/parser/ast/processor.rb:129:in `on_defs'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:239:in `process'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:255:in `block in process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `map'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/parser-2.0.0.beta9/lib/parser/ast/processor.rb:6:in `process_regular_node'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:239:in `process'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:255:in `block in process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `map'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/parser-2.0.0.beta9/lib/parser/ast/processor.rb:6:in `process_regular_node'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:239:in `process'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:255:in `block in process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `map'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/parser-2.0.0.beta9/lib/parser/ast/processor.rb:6:in `process_regular_node'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:239:in `process'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:255:in `block in process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `map'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:254:in `process_all'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/parser-2.0.0.beta9/lib/parser/ast/processor.rb:6:in `process_regular_node'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/ast-1.1.0/lib/ast/processor.rb:239:in `process'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cop/cop.rb:67:in `inspect'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cli.rb:102:in `block in inspect_file'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cli.rb:96:in `each'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cli.rb:96:in `reduce'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cli.rb:96:in `inspect_file'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cli.rb:55:in `block in run'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cli.rb:49:in `each'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/lib/rubocop/cli.rb:49:in `run'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/bin/rubocop:14:in `block in <top (required)>'
/Users/yaauie/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/gems/rubocop-0.9.0/bin/rubocop:13:in `<top (required)>'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/bin/rubocop:23:in `load'
/Users/yaauie/.rbenv/versions/1.9.3-p194/gemsets/scrubbed/bin/rubocop:23:in `<main>'

[edzhelyov]

Can you provide the content of scrubbed.rb file. This will allow me to reproduce the issue you have.

[yaauie]

I cannot. I will further attempt to provide a reproduction when I get a chance later today.

[yaauie]

Ok. I have a repro. This one is brought to you by "FOR THE LOVE OF ALL THAT IS HOLY, WHY!?"

# encoding: utf-8
condition_one = true
condition_two = false

if condition_two
  # do something
end unless condition_one