Can you please provide some sample code?

Full trace:

/Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/file_statistics.rb:115:in `block in is_code?': invalid byte sequence in US-ASCII (ArgumentError)

from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/file_statistics.rb:112:in `each'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/file_statistics.rb:112:in `each_with_index'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/file_statistics.rb:112:in `is_code?'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/file_statistics.rb:213:in `extend_heredocs'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/file_statistics.rb:40:in `initialize'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/formatters/base_formatter.rb:49:in `new'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/formatters/base_formatter.rb:49:in `add_file'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/code_coverage_analyzer.rb:143:in `block (2 levels) in dump_coverage_info'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/code_coverage_analyzer.rb:142:in `each'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/code_coverage_analyzer.rb:142:in `block in dump_coverage_info'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/code_coverage_analyzer.rb:135:in `each'
from /Users/me/.rvm/gems/ruby/1.9.1/gems/relevance-rcov-0.9.2.1/lib/rcov/code_coverage_analyzer.rb:135:in `dump_coverage_info'
from /Users/me/.rvm/ruby-1.9.1-p243/bin/rcov:428:in `block in <main>'

I tried it on a small Rails project and similar happened, it's first time I've used rcov so I don't know enough about what it is doing to isolate a recreatable piece of target code

Ah, I think it's because I'm using Shoulda, using the rake task below Rcov runs fine:

http://lojic.com/blog/2009/02/26/setup-shoulda-and-rcov-for-rails-222/

ok thanks for the info

I'm getting the same error. I'm not using Shoulda. I'll try to put together a failing example and narrow it down.

I found a non ASCII character in one of my source files.
Perhaps rcov should catch the error here and print the offending filename, line number and line.

Thanks for reporting this. I will take a look at it this week and see what I can find.

FWIW, I have plenty of non-US-ASCII characters in my source files and I’d much rather keep them – so finding a fix for this would be most appreciated. :)

You can reproduce by cloning art-decomp and trying to run ‘rake cov’ under Ruby 1.9 and RCov 0.9.6 – the RSpec specs will pass, but RCov will break with the ‘invalid byte sequence in US-ASCII’ error and won’t generate the coverage report.

I noticed this bug was labeled Ruby 186, I'm only seeing it in 1.9.1