Merge pull request #18769 from gsamokovarov/exception-wrapper-windows-paths

Show proper traces on Windows for the error pages

actionpack/lib/action_dispatch/middleware/exception_wrapper.rb

@@ -87,8 +87,7 @@ def self.status_code_for_exception(class_name)
 
     def source_extracts
       backtrace.map do |trace|
-        file, line = trace.split(":")
-        line_number = line.to_i
+        file, line_number = extract_file_and_line_number(trace)
 
         {
           code: source_fragment(file, line_number),
@@ -139,6 +138,13 @@ def source_fragment(path, line)
       end
     end
 
+    def extract_file_and_line_number(trace)
+      # Split by the first colon followed by some digits, which works for both
+      # Windows and Unix path styles.
+      file, line = trace.match(/^(.+?):(\d+).*$/, &:captures) || trace
+      [file, line.to_i]
+    end
+
     def expand_backtrace
       @exception.backtrace.unshift(
         @exception.to_s.split("\n")

actionpack/test/dispatch/exception_wrapper_test.rb

@@ -34,6 +34,23 @@ def backtrace
       assert_equal [ code: 'foo', line_number: 42 ], wrapper.source_extracts
     end
 
+    test '#source_extracts works with Windows paths' do
+      exc = TestError.new("c:/path/to/rails/app/controller.rb:27:in 'index':")
+
+      wrapper = ExceptionWrapper.new({}, exc)
+      wrapper.expects(:source_fragment).with('c:/path/to/rails/app/controller.rb', 27).returns('nothing')
+
+      assert_equal [ code: 'nothing', line_number: 27 ], wrapper.source_extracts
+    end
+
+    test '#source_extracts works with non standard backtrace' do
+      exc = TestError.new('invalid')
+
+      wrapper = ExceptionWrapper.new({}, exc)
+      wrapper.expects(:source_fragment).with('invalid', 0).returns('nothing')
+
+      assert_equal [ code: 'nothing', line_number: 0 ], wrapper.source_extracts
+    end
 
     test '#application_trace returns traces only from the application' do
       exception = TestError.new(caller.prepend("lib/file.rb:42:in `index'"))