Fix compilation with GCC 8

include/libtorrent/lazy_entry.hpp

@@ -354,6 +354,9 @@ namespace libtorrent {
 			swap(m_len, e.m_len);
 		}
 
+		lazy_entry(lazy_entry&&);
+		lazy_entry& operator=(lazy_entry&&);
+
 	private:
 
 		int capacity() const;
@@ -382,13 +385,13 @@ namespace libtorrent {
 		std::uint32_t m_type:3;
 
 		// non-copyable
-		lazy_entry(lazy_entry const&);
-		lazy_entry const& operator=(lazy_entry const&);
+		lazy_entry(lazy_entry const&) = delete;
+		lazy_entry const& operator=(lazy_entry const&) = delete;
 	};
 
 	struct TORRENT_DEPRECATED lazy_dict_entry
 	{
-		char const* name;
+		char const* name = nullptr;
 		lazy_entry val;
 	};
 

include/libtorrent/netlink.hpp

@@ -88,7 +88,7 @@ namespace libtorrent {
 
 		data_type* data()
 		{
-			return &m_sockaddr;
+			return reinterpret_cast<data_type*>(&m_sockaddr);
 		}
 
 		const data_type* data() const

src/lazy_bdecode.cpp

@@ -36,6 +36,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/lazy_entry.hpp"
 #include "libtorrent/bdecode.hpp" // for error codes
 #include "libtorrent/string_util.hpp" // for is_digit
+#include <algorithm>
 #include <cstring> // for memset
 #include <limits> // for numeric_limits
 #include <cstdio> // for snprintf
@@ -266,8 +267,7 @@ namespace {
 			int const capacity = this->capacity() * lazy_entry_grow_factor / 100;
 			auto* tmp = new (std::nothrow) lazy_dict_entry[capacity + 1];
 			if (tmp == nullptr) return nullptr;
-			std::memcpy(tmp, m_data.dict, sizeof(lazy_dict_entry) * (m_size + 1));
-			for (int i = 0; i < int(m_size); ++i) m_data.dict[i + 1].val.release();
+			std::move(m_data.dict, m_data.dict + m_size + 1, tmp);
 
 			delete[] m_data.dict;
 			m_data.dict = tmp;
@@ -437,8 +437,7 @@ namespace {
 			int const capacity = this->capacity() * lazy_entry_grow_factor / 100;
 			lazy_entry* tmp = new (std::nothrow) lazy_entry[capacity + 1];
 			if (tmp == nullptr) return nullptr;
-			std::memcpy(tmp, m_data.list, sizeof(lazy_entry) * (m_size + 1));
-			for (int i = 0; i < int(m_size); ++i) m_data.list[i + 1].release();
+			std::move(m_data.list, m_data.list + m_size + 1, tmp);
 
 			delete[] m_data.list;
 			m_data.list = tmp;
@@ -492,6 +491,18 @@ namespace {
 		return {m_begin, m_len};
 	}
 
+	lazy_entry::lazy_entry(lazy_entry&& other)
+		: lazy_entry()
+	{
+		this->swap(other);
+	}
+
+	lazy_entry& lazy_entry::operator=(lazy_entry&& other)
+	{
+		this->swap(other);
+		return *this;
+	}
+
 	namespace {
 
 	int line_longer_than(lazy_entry const& e, int limit)

src/torrent_info.cpp

@@ -1094,7 +1094,6 @@ namespace {
 			int const num_nodes = merkle_num_nodes(num_leafs);
 			m_merkle_first_leaf = num_nodes - num_leafs;
 			m_merkle_tree.resize(num_nodes);
-			std::memset(m_merkle_tree.data(), 0, aux::numeric_cast<std::size_t>(num_nodes * 20));
 			m_merkle_tree[0].assign(root_hash.string_ptr());
 		}
 

test/test_bencoding.cpp

@@ -34,6 +34,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include <iostream>
 #include <cstring>
+#include <utility>
 
 #ifndef TORRENT_NO_DEPRECATE
 #include "libtorrent/lazy_entry.hpp"
@@ -629,12 +630,17 @@ TORRENT_TEST(lazy_entry)
 
 		for (int i = 0; i < int(sizeof(b)/sizeof(b[0])); ++i)
 		{
-			lazy_entry e;
+			lazy_entry tmp;
 			error_code ec;
-			int ret = lazy_bdecode(b[i], b[i] + strlen(b[i]), e, ec, nullptr);
+			int ret = lazy_bdecode(b[i], b[i] + strlen(b[i]), tmp, ec, nullptr);
+			lazy_entry e;
+			e = std::move(tmp);
 			TEST_EQUAL(ret, -1);
 			TEST_CHECK(ec == error_code(bdecode_errors::unexpected_eof));
 			std::printf("%s\n", print_entry(e).c_str());
+
+			lazy_entry* moved = new lazy_entry(std::move(e));
+			delete moved;
 		}
 	}
 }