🐛 fixed integer overflow in dump function #1447

Closes #1447.
2019-01-20 12:26:01 +01:00 · 2019-01-20 12:26:01 +01:00 · 6de4df23e4
commit 6de4df23e4
parent e17e0d031f
3 changed files with 11 additions and 4 deletions
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@ -620,7 +620,7 @@ class serializer
        if (is_negative)
        {
            *buffer_ptr = '-';
-            abs_value = static_cast<number_unsigned_t>(0 - x);
+            abs_value = static_cast<number_unsigned_t>(-1 - x) + 1;

            // account one more byte for the minus sign
            n_chars = 1 + count_digits(abs_value);