fix string map

Author: 9il

source/mir/string_map.d

@@ -556,8 +556,6 @@ struct StringMap(T, U = uint)
                     return implementation._values[index];
                 }
                 assert (index <= length);
-                index = index < length ? implementation.indices[index] : length;
-                assert (index <= length);
             }
             else
             {
@@ -623,8 +621,6 @@ struct StringMap(T, U = uint)
                     return implementation.values[index];
                 }
                 assert (index <= length);
-                index = index < length ? implementation.indices[index] : length;
-                assert (index <= length);
             }
             else
             {
@@ -942,3 +938,18 @@ private struct StructImpl(T, U = uint)
         return false;
     }
 }
+
+unittest
+{
+    import mir.algebraic_alias.json: JsonAlgebraic;
+    import mir.string_map: StringMap;
+
+    StringMap!JsonAlgebraic token;
+    token[`access_token`] = "secret-data";
+    token[`expires_in`] = 3599;
+    token[`token_type`] = "Bearer";
+
+    assert(token[`access_token`] == "secret-data");
+    assert(token[`expires_in`] == 3599);
+    assert(token[`token_type`] == "Bearer"); // mir/string_map.d(511): No member: token_type
+}