International Components for Unicode (ICU) for C/C++ 63.1 has an integer overflow in number::impl::DecimalQuantity::toScientificString() in i18n/number_decimalquantity.cpp.
https://unicode-org.atlassian.net/browse/ICU-20246
https://github.com/unicode-org/icu/commit/53d8c8f3d181d87a6aa925b449b51c4a2c922a51
https://bugs.chromium.org/p/chromium/issues/detail?id=900059