Fix error backtrace formatting on Ruby 3.4+

Accomodate the new Ruby 3.4+ backtrace display format

CHANGELOG.md

@@ -23,6 +23,7 @@ that need to rely on procedural loading / reloading of files should use method i
 
 ### Fixed
 - Fixed an issue where a change to one example in compatibility testing wasn't fully adhered to ([luke-hill](https://github.com/luke-hill))
+- Fixed Ruby 3.4+ issue where error backtraces weren't being formatted. ([#1771](https://github.com/cucumber/cucumber-ruby/pull/1771) [orien](https://github.com/orien))
 
 ### Removed
 - `StepDefinitionLight` associated methods. The class itself is present but deprecated

lib/cucumber/formatter/backtrace_filter.rb

@@ -43,8 +43,10 @@ def exception
 
         if ::ENV['CUCUMBER_TRUNCATE_OUTPUT']
           # Strip off file locations
+          regexp = RUBY_VERSION >= '3.4' ? /(.*):in '/ : /(.*):in `/
           filtered = filtered.map do |line|
-            line =~ /(.*):in `/ ? Regexp.last_match(1) : line
+            match = regexp.match(line)
+            match ? match[1] : line
           end
         end
 

lib/cucumber/glue/invoke_in_world.rb

@@ -14,7 +14,10 @@ def self.replace_instance_exec_invocation_line!(backtrace, instance_exec_invocat
         return unless instance_exec_pos
 
         replacement_line = instance_exec_pos + INSTANCE_EXEC_OFFSET
-        backtrace[replacement_line].gsub!(/`.*'/, "`#{pseudo_method}'") if pseudo_method
+        if pseudo_method
+          pattern = RUBY_VERSION >= '3.4' ? /'.*'/ : /`.*'/
+          backtrace[replacement_line].gsub!(pattern, "`#{pseudo_method}'")
+        end
 
         depth = backtrace.count { |line| line == instance_exec_invocation_line }
         end_pos = depth > 1 ? instance_exec_pos : -1
@@ -49,7 +52,13 @@ def self.cucumber_compatible_arity?(args, block)
       def self.cucumber_run_with_backtrace_filtering(pseudo_method)
         yield
       rescue Exception => e
-        instance_exec_invocation_line = "#{__FILE__}:#{__LINE__ - 2}:in `cucumber_run_with_backtrace_filtering'"
+        yield_line_number = __LINE__ - 2
+        instance_exec_invocation_line =
+          if RUBY_VERSION >= '3.4'
+            "#{__FILE__}:#{yield_line_number}:in '#{name}.#{__method__}'"
+          else
+            "#{__FILE__}:#{yield_line_number}:in `#{__method__}'"
+          end
         replace_instance_exec_invocation_line!((e.backtrace || []), instance_exec_invocation_line, pseudo_method)
         raise e
       end