diff --git a/src/libregexis024fa/fa_first_stage_fix.cpp b/src/libregexis024fa/fa_first_stage_fix.cpp
index a37ee8b..94d5801 100644
--- a/src/libregexis024fa/fa_first_stage_fix.cpp
+++ b/src/libregexis024fa/fa_first_stage_fix.cpp
@@ -30,7 +30,7 @@ REGEX_IS024_FA_FirstStageFixInfo first_stage_fix_fa(FA_Container& sourceFa, FA_C
 
         std::vector<Marked> searched;
         searched.emplace_back(loa.nxt_node);
-        beg->search_mark = 0;
+        loa.nxt_node->search_mark = 0;
 
         for (size_t done = 0; done < searched.size(); done++){
             FA_Node& cur = *searched[done].node;
@@ -77,6 +77,11 @@ REGEX_IS024_FA_FirstStageFixInfo first_stage_fix_fa(FA_Container& sourceFa, FA_C
             if (my->type == match)
                 info.fed_chars_extend_one_right = true;
         }
+        {
+            Marked& loa_nxt_aux = searched[loa.nxt_node->search_mark];
+            if (loa_nxt_aux.making_copy)
+                reattach_nxt_node(&loa, loa_nxt_aux.copy);
+        }
 
         for (auto& v_sete: searched)
             v_sete.node->search_mark = -1;
@@ -151,7 +156,6 @@ void regular_second_stage_fix(const FA_Container& sourceFa, FA_Container& result
     assert(resultFa.all.empty() && !resultFa.start);
     if (!sourceFa.start)
         return;
-    // todo: rewrite first stage using that cool technique I just invented
     resultFa.start = sourceFa.start;
     // A vector of pointers in resutFa to nodes that belong to sourceFa. They should undergo a little bit of copying.
     std::vector<FA_Node**> homework = {&(resultFa.start)};
@@ -165,9 +169,9 @@ void regular_second_stage_fix(const FA_Container& sourceFa, FA_Container& result
             if (sourceV->type == match) {
                 FA_NodeOfMatch& mn = dynamic_cast<FA_NodeOfMatch&>(*sourceV);
                 FA_NodeOfMatch* res_mn = resultFa.makeMatch();
-                if (mn.ext_filter_added && mn.pending_filter != codeset_of_all) {
-                    assert(info1.fed_chars_extend_one_right);
-                    FA_NodeOfOneCharRead* res_ocr2n = resultFa.makeOneCharRead(mn.pending_filter, true);
+                if (info1.fed_chars_extend_one_right) {
+                    FA_NodeOfOneCharRead* res_ocr2n = resultFa.makeOneCharRead(
+                       mn.ext_filter_added ? mn.pending_filter : codeset_of_all, true);
                     reattach_nxt_node(res_ocr2n, res_mn);
                     sourceIdToResNode[sourceVId] = res_ocr2n;
                 } else {
diff --git a/src/libregexis024test/test2.cpp b/src/libregexis024test/test2.cpp
index cddbfac..5a115c2 100644
--- a/src/libregexis024test/test2.cpp
+++ b/src/libregexis024test/test2.cpp
@@ -2,7 +2,7 @@
 #include <libregexis024test/byte_code_disassembler.h>
 
 int main(){
-    std::string regular_expression = "!selarr{boba{ca}}^a#boba(b)c$";
+    std::string regular_expression = "\\>1*";
     REGEX_IS024_MeaningContext regex(regular_expression.size(), regular_expression.c_str());
     if (regex.error)
         fprintf(stderr, "%s\n", regex.error_msg.c_str());
diff --git a/src/libregexis024test/test4.cpp b/src/libregexis024test/test4.cpp
index 4fd5ec0..a7f645a 100644
--- a/src/libregexis024test/test4.cpp
+++ b/src/libregexis024test/test4.cpp
@@ -10,14 +10,30 @@ void test(const string& input, const string& pattern, const MatchInfo& right_ans
     MatchInfo given_answer;
     track_var_list retTrackVarList;
     string retStatus;
-    matchStrToRegexp(input, pattern, given_answer, retTrackVarList, retStatus);
+    int ret = matchStrToRegexp(input, pattern, given_answer, retTrackVarList, retStatus);
+    if (ret < 0) {
+        throw runtime_error("Test failed. matching. " + retStatus);
+    }
     if (given_answer != right_answer) {
-        throw runtime_error("Test failed");
+        throw runtime_error("Test failed.");
     }
     printf("Test passed\n");
 }
 
 int main() {
+    test("C111111111111", "C\\>1*", MatchInfo({}, {}));
+    // return 0;
+    test("GET / HTTP/1.1\r\nHost: bibura sosat\r\nLos-es-raus: a\rfaafafdf\r\n\r\n",
+        "!dfa;(GET|POST) / HTTP/(1.1|1.0|0.9)\r\n([\\u0021-\\u007E&^:]+:([\\u0000-\\u007F&^\r\n])*\r\n)*\r\n",
+        MatchInfo());
+    test("\r24234\r\n", "[\\u0000-\\u007F&^\r\n]*\r\n", MatchInfo());
+    test("\n3432\r\n", "[\\u0000-\\u007F&^\r\n]*\r\n", MatchInfo());
+    test("3:::;;432\r\n", "[\\u0000-\\u007F&^\r\n]*\r\n", MatchInfo({}, {}));
+    test("3:::;;432   \r\n", "[\\u0000-\\u007F&^\r\n]*\r\n", MatchInfo({}, {}));
+    test("GET / HTTP/0.9\r\nHost: bibura sosat\r\nLos-es-raus: afaafafdf\r\n\r\n",
+        "^(GET|POST\\>) / HTTP/(1.1|1.0|0.9)\r\n([\\u0021-\\u007E&^:]+:([\\u0000-\\u007F&^\r\n])*\r\n)*\r\n",
+        MatchInfo({}, {}));
+    // return 0;
     test("b", "#boba(b)", MatchInfo({{0, 0}, {1, 1}}, {}));
     test("abc", "!selarr{boba{ca}}^a#boba(b)c$", MatchInfo({{0, 1}, {1, 2}}, {1, 2}));
     for (int i = 0; i < 64; i++) {
diff --git a/src/libregexis024tools/stringmatching.cpp b/src/libregexis024tools/stringmatching.cpp
index 41f10b3..f4f9338 100644
--- a/src/libregexis024tools/stringmatching.cpp
+++ b/src/libregexis024tools/stringmatching.cpp
@@ -89,9 +89,8 @@ int regexis024::matchStrToRegexp(const std::string& input, const std::string& pa
             retMatchInfo.sa[i] = vm.getMatchedThreadSAValue(i);
         retMatchInfo.ca_history = vm.getMatchedThreadCABranchReverse();
         std::reverse(retMatchInfo.ca_history.begin(), retMatchInfo.ca_history.end());
-        return 0;
     }
-    return -1;
+    return 0;
 }
 
 bool regexis024::MatchInfo::operator==(const MatchInfo &other) const {