fixes #310

README.md

@@ -512,7 +512,7 @@ To compile and run the tests, you need to execute
 $ make check
 
 ===============================================================================
-All tests passed (8905158 assertions in 35 test cases)
+All tests passed (8905161 assertions in 35 test cases)
 ```
 
 For more information, have a look at the file [.travis.yml](https://github.com/nlohmann/json/blob/master/.travis.yml).

src/json.hpp

@@ -8614,7 +8614,7 @@ basic_json_parser_63:
                 std::string line;
                 std::getline(*m_stream, line);
                 // add line with newline symbol to the line buffer
-                m_line_buffer += "\n" + line;
+                m_line_buffer += line + "\n";
             }
 
             // set pointers

src/json.hpp.re2c

@@ -7911,7 +7911,7 @@ class basic_json
                 std::string line;
                 std::getline(*m_stream, line);
                 // add line with newline symbol to the line buffer
-                m_line_buffer += "\n" + line;
+                m_line_buffer += line + "\n";
             }
 
             // set pointers

test/src/unit-regression.cpp

@@ -466,4 +466,20 @@ TEST_CASE("regression tests")
             CHECK_NOTHROW(j << f);
         }
     }
+
+    SECTION("issue #310 - make json_benchmarks no longer working in 2.0.4")
+    {
+        for (auto filename :
+                {
+                    "test/data/regression/floats.json",
+                    "test/data/regression/signed_ints.json",
+                    "test/data/regression/unsigned_ints.json"
+                })
+        {
+            CAPTURE(filename);
+            json j;
+            std::ifstream f(filename);
+            CHECK_NOTHROW(j << f);
+        }
+    }
 }