--- a/extern/json/json.hpp	Sat Sep 02 11:24:42 2017 +0200
+++ b/extern/json/json.hpp	Sat Aug 26 09:10:57 2017 +0200
@@ -6460,12 +6460,17 @@
     {
         // assertion to check that the iterator range is indeed contiguous,
         // see http://stackoverflow.com/a/35008842/266378 for more discussion
+
+        // Disable the assert because it triggers a bug in gcc7/glibc
+        // https://github.com/nlohmann/json/issues/705
+#if 0
         assert(std::accumulate(first, last, std::pair<bool, int>(true, 0),
                                [&first](std::pair<bool, int> res, decltype(*first) val)
         {
             res.first &= (val == *(std::next(std::addressof(*first), res.second++)));
             return res;
         }).first);
+#endif
 
         // assertion to check that each element is 1 byte long
         static_assert(sizeof(typename std::iterator_traits<IteratorType>::value_type) == 1,