[DRE-maint] Bug#958973: ruby-curses: Emits warning: "rb_safe_level will be removed in Ruby 3.0", fixed upstream in 1.3.2

[Axel Beckert]

Control: severity -1 serious

Axel Beckert wrote:
> running ruby-written irqtop on Debian Unstable contantly emits this
> warning:
> 
> /usr/bin/irqtop:545: warning: rb_safe_level will be removed in Ruby 3.0
> 
> which makes it quite unusable as the curses screen looks like this after
> a few seconds:

Ruby 3.0 is now the default in Debian Unstable and Testing and due to
this error, irqtop no more works at all there:

~ → irqtop
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require': /usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/3.0.0/curses.so: undefined symbol: rb_safe_level - /usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/3.0.0/curses.so (LoadError)
        from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /usr/lib/ruby/vendor_ruby/curses.rb:18:in `rescue in <top (required)>'
        from /usr/lib/ruby/vendor_ruby/curses.rb:14:in `<top (required)>'
        from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /usr/bin/irqtop:9:in `<main>'
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- 3.0/curses.so (LoadError)
        from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /usr/lib/ruby/vendor_ruby/curses.rb:16:in `<top (required)>'
        from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /usr/bin/irqtop:9:in `<main>'

Raising the severity to serious accordingly.

		Regards, Axel
-- 
 ,''`.  |  Axel Beckert <abe at debian.org>, https://people.debian.org/~abe/
: :' :  |  Debian Developer, ftp.ch.debian.org Admin
`. `'   |  4096R: 2517 B724 C5F6 CA99 5329  6E61 2FF9 CD59 6126 16B5
  `-    |  1024D: F067 EA27 26B9 C3FC 1486  202E C09E 1D89 9593 0EDE