https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68073
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
This is due to the new small string optimization in libstdc++.
It doesn't use the heap anymore for this case.
Your code calls the string destructor directly:
202 template<typename T, typename... Types>
203 struct variant_helper<T, Types...>
204 {
205 VARIANT_INLINE static void destroy(const std::size_t id, void * data)
206 {
207 if (id == sizeof...(Types))
208 {
209 reinterpret_cast<T*>(data)->~T();
210 }
#1 0x401a5c in mapnik::util::variant_helper<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >, bool>::destroy(unsigned long,
void*) mapnik/include/mapnik/util/variant.hpp:209
So it will try to free an address that was never allocated.
