Update DeadEnd to latest

```
$ tool/sync_default_gems.rb dead_end
```

Incorporates changes from these prs:

- [Breaking] Lazy load DeadEnd internals only if there is a Syntax error. Use `require "dead_end"; require "dead_end/api"` to load eagerly all internals. Otherwise `require "dead_end"` will set up an autoload for the first time the DeadEnd module is used in code. This should only happen on a syntax error. (ruby/syntax_suggest#142)
- Monkeypatch `SyntaxError#detailed_message` in Ruby 3.2+ instead of `require`, `load`, and `require_relative` (ruby/syntax_suggest#139)

lib/dead_end.rb

@@ -1,4 +1,3 @@
 # frozen_string_literal: true
 
-require_relative "dead_end/api"
 require_relative "dead_end/core_ext"

lib/dead_end/api.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative "version"
 
 require "tmpdir"
@@ -7,6 +9,8 @@
 require "timeout"
 
 module DeadEnd
+  VERSION = UnloadedDeadEnd::VERSION
+
   # Used to indicate a default value that cannot
   # be confused with another input.
   DEFAULT_VALUE = Object.new.freeze
@@ -16,7 +20,7 @@ class Error < StandardError; end
 
   # DeadEnd.handle_error [Public]
   #
-  # Takes a `SyntaxError`` exception, uses the
+  # Takes a `SyntaxError` exception, uses the
   # error message to locate the file. Then the file
   # will be analyzed to find the location of the syntax
   # error and emit that location to stderr.

lib/dead_end/core_ext.rb

@@ -1,35 +1,87 @@
 # frozen_string_literal: true
 
-# Monkey patch kernel to ensure that all `require` calls call the same
-# method
-module Kernel
-  module_function
-
-  alias_method :dead_end_original_require, :require
-  alias_method :dead_end_original_require_relative, :require_relative
-  alias_method :dead_end_original_load, :load
-
-  def load(file, wrap = false)
-    dead_end_original_load(file)
-  rescue SyntaxError => e
-    DeadEnd.handle_error(e)
-  end
+# Allow lazy loading, only load code if/when there's a syntax error
+autoload :DeadEnd, "dead_end/api"
+
+# Ruby 3.2+ has a cleaner way to hook into Ruby that doesn't use `require`
+if SyntaxError.new.respond_to?(:detailed_message)
+  module DeadEndUnloaded
+    class MiniStringIO
+      def initialize(isatty: $stderr.isatty)
+        @string = +""
+        @isatty = isatty
+      end
 
-  def require(file)
-    dead_end_original_require(file)
-  rescue SyntaxError => e
-    DeadEnd.handle_error(e)
+      attr_reader :isatty
+      def puts(value = $/, **)
+        @string << value
+      end
+
+      attr_reader :string
+    end
   end
 
-  def require_relative(file)
-    if Pathname.new(file).absolute?
-      dead_end_original_require file
-    else
-      relative_from = caller_locations(1..1).first
-      relative_from_path = relative_from.absolute_path || relative_from.path
-      dead_end_original_require File.expand_path("../#{file}", relative_from_path)
+  SyntaxError.prepend Module.new {
+    def detailed_message(highlight: nil, **)
+      message = super
+      file = DeadEnd::PathnameFromMessage.new(message).call.name
+      io = DeadEndUnloaded::MiniStringIO.new
+
+      if file
+        DeadEnd.call(
+          io: io,
+          source: file.read,
+          filename: file
+        )
+        annotation = io.string
+
+        annotation + message
+      else
+        message
+      end
+    rescue => e
+      if ENV["DEBUG"]
+        $stderr.warn(e.message)
+        $stderr.warn(e.backtrace)
+      end
+
+      raise e
+    end
+  }
+else
+  autoload :Pathname, "pathname"
+
+  # Monkey patch kernel to ensure that all `require` calls call the same
+  # method
+  module Kernel
+    module_function
+
+    alias_method :dead_end_original_require, :require
+    alias_method :dead_end_original_require_relative, :require_relative
+    alias_method :dead_end_original_load, :load
+
+    def load(file, wrap = false)
+      dead_end_original_load(file)
+    rescue SyntaxError => e
+      DeadEnd.handle_error(e)
+    end
+
+    def require(file)
+      dead_end_original_require(file)
+    rescue SyntaxError => e
+      DeadEnd.handle_error(e)
+    end
+
+    def require_relative(file)
+      if Pathname.new(file).absolute?
+        dead_end_original_require file
+      else
+        relative_from = caller_locations(1..1).first
+        relative_from_path = relative_from.absolute_path || relative_from.path
+        dead_end_original_require File.expand_path("../#{file}", relative_from_path)
+      end
+    rescue SyntaxError => e
+      DeadEnd.handle_error(e)
     end
-  rescue SyntaxError => e
-    DeadEnd.handle_error(e)
   end
 end

lib/dead_end/dead_end.gemspec

@@ -8,7 +8,7 @@ end
 
 Gem::Specification.new do |spec|
   spec.name = "dead_end"
-  spec.version = DeadEnd::VERSION
+  spec.version = UnloadedDeadEnd::VERSION
   spec.authors = ["schneems"]
   spec.email = ["richard.schneeman+foo@gmail.com"]
 

lib/dead_end/pathname_from_message.rb

@@ -13,6 +13,8 @@ module DeadEnd
   #    # => "/tmp/scratch.rb"
   #
   class PathnameFromMessage
+    EVAL_RE = /^\(eval\):\d+/
+    STREAMING_RE = /^-:\d+/
     attr_reader :name
 
     def initialize(message, io: $stderr)
@@ -24,14 +26,20 @@ def initialize(message, io: $stderr)
     end
 
     def call
-      until stop?
-        @guess << @parts.shift
-        @name = Pathname(@guess.join(":"))
-      end
+      if skip_missing_file_name?
+        if ENV["DEBUG"]
+          @io.puts "DeadEnd: Could not find filename from #{@line.inspect}"
+        end
+      else
+        until stop?
+          @guess << @parts.shift
+          @name = Pathname(@guess.join(":"))
+        end
 
-      if @parts.empty?
-        @io.puts "DeadEnd: Could not find filename from #{@line.inspect}"
-        @name = nil
+        if @parts.empty?
+          @io.puts "DeadEnd: Could not find filename from #{@line.inspect}"
+          @name = nil
+        end
       end
 
       self
@@ -43,5 +51,9 @@ def stop?
 
       @name&.exist?
     end
+
+    def skip_missing_file_name?
+      @line.match?(EVAL_RE) || @line.match?(STREAMING_RE)
+    end
   end
 end

lib/dead_end/version.rb

@@ -1,5 +1,9 @@
 # frozen_string_literal: true
 
-module DeadEnd
-  VERSION = "3.1.1"
+# Calling `DeadEnd::VERSION` forces an eager load due to
+# an `autoload` on the `DeadEnd` constant.
+#
+# This is used for gemspec access in tests
+module UnloadedDeadEnd
+  VERSION = "3.1.2"
 end