diff --git a/version0/crdt/text_document.hpp b/version0/crdt/text_document.hpp
index 41e453b..8e9fe5b 100644
--- a/version0/crdt/text_document.hpp
+++ b/version0/crdt/text_document.hpp
@@ -147,8 +147,13 @@ struct TextDocument {
 		std::vector<Op> ops;
 
 		for (size_t i = first_idx; i < last_idx; i++) {
+			if (!state.list.at(i).value.has_value()) {
+				// allready deleted
+				continue;
+			}
+
 			ops.emplace_back(typename ListType::OpDel{
-				state.list[i].id
+				state.list.at(i).id
 			});
 
 			// TODO: do delets get a seq?????
@@ -163,7 +168,7 @@ struct TextDocument {
 	// note: rn it only creates 1 diff patch
 	std::vector<Op> merge(std::string_view text) {
 		if (text.empty()) {
-			if (state.list.empty()) {
+			if (state.list.empty() || state.doc_size == 0) {
 				// no op
 				return {};
 			} else {
@@ -185,6 +190,7 @@ struct TextDocument {
 		// find start and end of changes
 		// start
 		size_t list_start = 0;
+		size_t list_start_counted = 0;
 		size_t text_start = 0;
 		bool differ = false;
 		for (; list_start < state.list.size() && text_start < text.size();) {
@@ -201,6 +207,7 @@ struct TextDocument {
 
 			list_start++;
 			text_start++;
+			list_start_counted++;
 		}
 
 		// doc and text dont differ
@@ -214,7 +221,10 @@ struct TextDocument {
 		// +1 so i can have unsigned
 		size_t list_end = state.list.size();
 		size_t text_end = text.size();
-		for (; list_end > 0 && text_end > 0 && list_end >= list_start && text_end >= text_start;) {
+		//for (; list_end > 0 && text_end > 0 && list_end >= list_start && text_end >= text_start;) {
+		//while (list_end >= list_start && text_end >= text_start) {
+		size_t list_end_counted = 0;
+		while (list_start_counted - list_end_counted > state.doc_size && text_end >= text_start) {
 			// jump over tombstones
 			if (!state.list[list_end-1].value.has_value()) {
 				list_end--;
@@ -227,6 +237,7 @@ struct TextDocument {
 
 			list_end--;
 			text_end--;
+			list_end_counted++;
 		}
 
 		//std::cout << "list_end: " << list_end << " text_end: " << text_end << "\n";
@@ -237,7 +248,7 @@ struct TextDocument {
 		if (list_start <= list_end && list_start < state.list.size()) {
 			ops = delRange(
 				state.list[list_start].id,
-				list_end < state.list.size() ? std::make_optional(state.list[list_end].id) : std::nullopt
+				(list_start == list_end ? list_end+1 : list_end) < state.list.size() ? std::make_optional(state.list[list_end].id) : std::nullopt
 			);
 			//std::cout << "deleted: " << ops.size() << "\n";
 		}
diff --git a/version0/test2.cpp b/version0/test2.cpp
index db96bb5..68765c9 100644
--- a/version0/test2.cpp
+++ b/version0/test2.cpp
@@ -5,6 +5,7 @@
 #include <random>
 #include <iostream>
 #include <cassert>
+#include <variant>
 
 // single letter agent, for testing only
 using Agent = char;
@@ -411,6 +412,91 @@ void testBugSame(void) {
 	assert(doc.getText() == new_text2);
 }
 
+void testBugDoubleDel(void) {
+	Doc doc;
+	doc.local_agent = 'A';
+
+	{
+		std::string_view new_text{"a"};
+		doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+
+	{
+		std::string_view new_text{""};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+		assert(ops.size() == 1);
+		assert(std::holds_alternative<ListType::OpDel>(ops.front()));
+		assert(std::get<ListType::OpDel>(ops.front()).id.seq == 0);
+	}
+
+	{
+		std::string_view new_text{""};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+		assert(ops.size() == 0);
+	}
+}
+
+void testBugSameDel(void) {
+	Doc doc;
+	doc.local_agent = 'A';
+
+	{
+		std::string_view new_text{"a"};
+		doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+
+	{
+		std::string_view new_text{"aa"};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+
+	{
+		std::string_view new_text{"a"};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+}
+
+void testBugSameDel2(void) {
+	Doc doc;
+	doc.local_agent = 'A';
+
+	{
+		std::string_view new_text{"a"};
+		doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+
+	{
+		std::string_view new_text{"aa"};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+
+	{
+		std::string_view new_text{"aaa"};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+
+	{
+		std::string_view new_text{"aa"};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+
+	{
+		std::string_view new_text{"a"};
+		const auto ops = doc.merge(new_text);
+		assert(doc.getText() == new_text);
+	}
+}
+
 int main(void) {
 	const size_t loops = 1'000;
 	{
@@ -469,10 +555,31 @@ int main(void) {
 	std::cout << std::string(40, '=') << "\n";
 
 	{
-		std::cout << "testBugNLNL:\n";
+		std::cout << "testBugSame:\n";
 		testBugSame();
 	}
 
+	std::cout << std::string(40, '=') << "\n";
+
+	{
+		std::cout << "testBugDoubleDel:\n";
+		testBugDoubleDel();
+	}
+
+	std::cout << std::string(40, '=') << "\n";
+
+	{
+		std::cout << "testBugSameDel:\n";
+		testBugSameDel();
+	}
+
+	std::cout << std::string(40, '=') << "\n";
+
+	{
+		std::cout << "testBugSameDel2:\n";
+		testBugSameDel2();
+	}
+
 	return 0;
 }
 
diff --git a/vim_research/test1.cpp b/vim_research/test1.cpp
index 888a502..5d9243a 100644
--- a/vim_research/test1.cpp
+++ b/vim_research/test1.cpp
@@ -210,8 +210,8 @@ int main(void) {
 	doc.local_agent = remote_address.port; // tmp: use local port as id
 
 	while (true) {
-		// 10MiB
-		auto buffer = std::make_unique<std::array<uint8_t, 1024*1024*10>>();
+		// 100MiB
+		auto buffer = std::make_unique<std::array<uint8_t, 1024*1024*100>>();
 
 		int64_t bytes_received {0};
 		bytes_received = zed_net_tcp_socket_receive(&remote_socket, buffer->data(), buffer->size());