Merge branch 'develop' into feature/filenotfound

test/src/unit-regression.cpp

@@ -501,4 +501,19 @@ TEST_CASE("regression tests")
         std::ifstream f("file_not_found.json");
         CHECK_THROWS_AS(json::parse(f), std::invalid_argument);
     }
+
+    SECTION("issue #367 - calling stream at EOF")
+    {
+        std::stringstream ss;
+        json j;
+        ss << "123";
+        CHECK_NOTHROW(j << ss);
+
+        // see https://github.com/nlohmann/json/issues/367#issuecomment-262841893:
+        // ss is not at EOF; this yielded an error before the fix
+        // (threw basic_string::append). No, it should just throw
+        // a parse error because of the EOF.
+        CHECK_THROWS_AS(j << ss, std::invalid_argument);
+        CHECK_THROWS_WITH(j << ss, "parse error - unexpected end of input");
+    }
 }