[DRE-maint] Bug#747689: FTBFS: /usr/bin/ruby2.1: No such file or directory -- /usr/bin/testrb2.0

[Christian Hofstaedtler]

Source: ruby-lapack
Version: 1.6-1
Severity: serious
Justification: fails to build from source (but built successfully in the past)
User: debian-ruby at lists.debian.org
Usertags: ruby2.0-rm

Dear Maintainer,

During a rebuild of ruby-related packages your package failed to
build with these errors:

Running tests for ruby2.1 using debian/ruby-tests.rb...
/usr/bin/ruby2.1: No such file or directory -- /usr/bin/testrb2.0 (LoadError)
debian/ruby-tests.rb:4:in `<main>': unhandled exception
ERROR: Test "ruby2.1" failed. Exiting.
dh_auto_install: dh_ruby --install /«PKGBUILDDIR»/debian/tmp returned exit code 1
make: *** [binary] Error 1


Please note that the default ruby has been switched to 2.1 in sid.
If possible, please switch to the metapackages and `dh_ruby
--print-supported` for detecting the ruby to build for.
(Also, if everything goes according to plan, this is the last ruby
transition for jessie.)

Please find the full build log attached.

Thanks,
  -ch
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