testsuite fails with ruby 3.4.0dev

[mtasaka]

ruby 3.4 is to be released on 2024-Dec-25, and trying with ruby 3.4.0dev (2024-12-20 master 978df259ca) +PRISM [x86_64-linux] :
ruby/ruby@978df25
(perhaps as well as ruby 3.4.0 rc1),

Trying ruby-dbus git head ( 5f98ee3 ) rspec testsuite fails like:

[mockbuild@acda33e8d75943d4bbbee7418ed991a6 ruby-dbus]$ spec/tools/test_env rspec spec

Failures:

  1) ErrMsgTest tests report dbus interface
     Failure/Error:
       expect { @obj.NoSuchMethod }
         .to raise_error(NameError, /DBus interface.*#{@obj.default_iface}/)
     
       expected NameError with message matching /DBus interface.*org.ruby.SampleInterface/, got #<NameError: undefined method 'NoSuchMethod' for class '#<Class:#<DBus::ProxyObjectInterface:0x00007f066720af20>>'> with backtrace:
         # ./lib/dbus/proxy_object.rb:158:in 'Kernel#method'
         # ./lib/dbus/proxy_object.rb:158:in 'DBus::ProxyObject#method_missing'
         # ./spec/err_msg_spec.rb:20:in 'block (3 levels) in <top (required)>'
         # ./spec/err_msg_spec.rb:21:in 'block (2 levels) in <top (required)>'
     # ./spec/err_msg_spec.rb:21:in 'block (2 levels) in <top (required)>'

Finished in 50.63 seconds (files took 0.71689 seconds to load)
1090 examples, 1 failure

Failed examples:

rspec ./spec/err_msg_spec.rb:17 # ErrMsgTest tests report dbus interface

[mtasaka]

This is because ruby3.4 changes backtrace format:
https://github.com/ruby/ruby/blob/978df259ca90c25ca2acb95a099ff6d3ff0161b0/NEWS.md?plain=1#L334-L352

especially, opening quote changes from backtick to single quote.
So this regex does not match and then raises the error as it is:

ruby-dbus/lib/dbus/proxy_object.rb

Line 162 in 5f98ee3

raise unless e.to_s =~ /undefined method `#{name}'/

while what is expected is that this line is executed and raise exception:

ruby-dbus/lib/dbus/proxy_object.rb

Line 165 in 5f98ee3

raise NoMethodError, "undefined method `#{name}' for DBus interface `#{@default_iface}' on object `#{@path}'"