Handle mismatched end when using rescue without begin

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## HEAD (unreleased)
 
+- Handle mismatched end when using rescue without begin (https://github.com/zombocom/dead_end/pull/83)
 - CLI returns non-zero exit code when syntax error is found (https://github.com/zombocom/dead_end/pull/86)
 - Let -v respond with gem version instead of 'unknown' (https://github.com/zombocom/dead_end/pull/82)
 

lib/dead_end/who_dis_syntax_error.rb

@@ -58,7 +58,7 @@ def on_parse_error(msg)
       when /expecting end-of-input/
         @unmatched_symbol = :end
         @error_symbol = :unmatched_syntax
-      when /unexpected .* expecting '(?<unmatched_symbol>.*)'/
+      when /unexpected .* expecting ['`]?(?<unmatched_symbol>[^']*)/
         @unmatched_symbol = $1.to_sym if $1
         @error_symbol = :unmatched_syntax
       when /unexpected `end'/, # Ruby 2.7 and 3.0

spec/unit/who_dis_syntax_error_spec.rb

@@ -4,18 +4,41 @@
 
 module DeadEnd
   RSpec.describe WhoDisSyntaxError do
-    it "determines the type of syntax error to be an unmatched end" do
-      expect(
-        WhoDisSyntaxError.new("def foo;").call.error_symbol
-      ).to eq(:missing_end)
+    context "determines the type of syntax error to be an unmatched end" do
+      it "with missing or extra end's" do
+        expect(
+          WhoDisSyntaxError.new("def foo;").call.error_symbol
+        ).to eq(:missing_end)
 
-      expect(
-        WhoDisSyntaxError.new("def foo; end; end").call.error_symbol
-      ).to eq(:unmatched_syntax)
+        expect(
+          WhoDisSyntaxError.new("def foo; end; end").call.error_symbol
+        ).to eq(:unmatched_syntax)
 
-      expect(
-        WhoDisSyntaxError.new("def foo; end; end").call.unmatched_symbol
-      ).to eq(:end)
+        expect(
+          WhoDisSyntaxError.new("def foo; end; end").call.unmatched_symbol
+        ).to eq(:end)
+      end
+
+      it "with unexpected rescue" do
+        source = <<~EOM
+          def foo
+            if bar
+              "baz"
+            else
+              "foo"
+          rescue FooBar
+            nil
+          end
+        EOM
+
+        expect(
+          WhoDisSyntaxError.new(source).call.error_symbol
+        ).to eq(:unmatched_syntax)
+
+        expect(
+          WhoDisSyntaxError.new(source).call.unmatched_symbol
+        ).to eq(:end)
+      end
     end
 
     context "determines the type of syntax error to be an unmatched pipe" do