download fallito: -5

[DavidParkin]

[------------------------------------------########] 2 MB, 0 KB/s, available_b/size 0/2284826 0/2284826 download fallito: -5

Thread 2 "MegaFuse" hit Breakpoint 5, MegaFuseApp::transfer_failed (this=0x818a220, td=0x0, filename=..., e=API_EFAILED) at src/MegaFuseApp.cpp:266
266 it->second.status = file_cache_row::INVALID;
gdb$ p filename
$7 = (std::__cxx11::string &) @0x81aa2a8: {static npos = 0xffffffff, _M_dataplus = {<std::allocator> = {<__gnu_cxx::new_allocator> = {}, }, _M_p = 0x81aa2b0 "4821"}, _M_string_length = 0x4, {_M_local_buf = "4821\000g\000\000\000\000\000\000\000\000\000", _M_allocated_capacity = 0x31323834}}
gdb$ p filename.c_str()
$8 = 0x81aa2b0 "4821"
I guess from the printfs that you are aware of problems in this area but I couldn't find an issue.
Finally ends
Error: attempt to dereference a past-the-end iterator.

1. Can I supply more info?
2. Any workarounds?
   The data is a Borg backup and the file is recently created, the last one written and appears to be incomplete.

[tomakkermans]

Similar error here, with this terminal output:
(.....)
topen riuscito
download fallito: -20
/usr/include/c++/7/debug/safe_iterator.h:283:
Error: attempt to dereference a past-the-end iterator.

Objects involved in the operation:
iterator "this" @ 0x0x7fe9150248b0 {
type = __gnu_debug::_Safe_iterator<std::__detail::_Node_iterator<std::pair<std::__cxx11::basic_string<char, std::char_traits, std::allocator > const, file_cache_row>, false, true>, std::__debug::unordered_map<std::__cxx11::basic_string<char, std::char_traits, std::allocator >, file_cache_row, std::hash<std::__cxx11::basic_string<char, std::char_traits, std::allocator > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits, std::allocator > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits, std::allocator > const, file_cache_row> > > > (mutable iterator);
state = past-the-end;
references sequence with type 'std::__debug::unordered_map<std::__cxx11::basic_string<char, std::char_traits, std::allocator >, file_cache_row, std::hash<std::__cxx11::basic_string<char, std::char_traits, std::allocator > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits, std::allocator > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits, std::allocator > const, file_cache_row> > >' @ 0x0x55974e994fd0
}
Aborted (core dumped)