diff --git a/building/main.cpp b/building/main.cpp
index 8fe329f..c74e000 100644
--- a/building/main.cpp
+++ b/building/main.cpp
@@ -14,7 +14,7 @@ struct Libregexis024BuildSystem {
         "-Wno-unused-but-set-variable", "-Wno-reorder"};
     std::vector<std::string> version_flags = {"--std", "c++14", "-D", "_POSIX_C_SOURCE=200809L"};
 
-    std::vector<std::string> debug_defines_release = {};
+    std::vector<std::string> debug_defines_release = {"_GLIBCXX_DEBUG"};
     std::vector<std::string> debug_defines_debug = {"_GLIBCXX_DEBUG", "LIBREGEXIS024_DEBUG", "LIBREGEXIS024_ALLOW_LOUD"};
     std::vector<std::string> opt_flags_release = {"-g", "-O2"};
     std::vector<std::string> opt_flags_debug = {"-g", "-ggdb", "-O0"};
diff --git a/src/libregexis024sol/backslash_expression.cpp b/src/libregexis024sol/backslash_expression.cpp
index f265e3e..283b4f9 100644
--- a/src/libregexis024sol/backslash_expression.cpp
+++ b/src/libregexis024sol/backslash_expression.cpp
@@ -56,6 +56,7 @@ namespace regexis024 {
                 if (leader >= 0){
                     ret_is_multicode = false;
                     ret_set = codeset_of_one_char(leader);
+                    readChar(ctx);
                 } else {
                     report(ctx, "backslash in the wrong place");
                 }
diff --git a/src/libregexis024sol/part_of_expr_that_tracks.h b/src/libregexis024sol/part_of_expr_that_tracks.h
index 85ce883..49fc5ae 100644
--- a/src/libregexis024sol/part_of_expr_that_tracks.h
+++ b/src/libregexis024sol/part_of_expr_that_tracks.h
@@ -8,19 +8,9 @@
 
 namespace regexis024 {
     struct SubtrackingNameUsageInfo: public TrackingVariableInfo{
-        bool stored_in_ca = true;
-        bool stored_in_sa = false;
-
         bool discovered = false;
-        tracking_var_type_t type;
-        /* These fields will be -1 if unused */
-        int colarr_first = -1;
-        int colarr_second = -1;
-
         bool used_in_sifting = false;
         bool minimizing = false;
-        int selarr_first = -1;
-        int selarr_second = -1;
     };
 
     struct KnownTrackingTools {
diff --git a/src/libregexis024test/test4.cpp b/src/libregexis024test/test4.cpp
index 8524331..40b8804 100644
--- a/src/libregexis024test/test4.cpp
+++ b/src/libregexis024test/test4.cpp
@@ -51,6 +51,17 @@ void boba(const vector<pair<string, bool>>& input, const string& pattern) {
 }
 
 int main() {
+#define reg_ALPHA "[a-zA-Z]"
+#define reg_pchar "([a-zA-Z0-9\\-._~\\!$\\&'()*+@:,;=]|%[0-9a-hA-H]!r{2})"
+#define reg_query "(" reg_pchar"|[?/])*"
+#define reg_lin_ws "([ \t]|\r\n[ \t])*"
+#define reg_request_line "#method(" reg_ALPHA"+) #uri_path(/(" reg_pchar"|/)*)(\\?#uri_query(" reg_query"))? HTTP/#http_version(!digit;+.!digit;+)\r\n"
+#define reg_filed_value "(" reg_lin_ws"#header_field_value_part([\\u0021-\\u007e&^\r\n]+))*" reg_lin_ws
+#define reg_HTTP_message reg_request_line "(#header_field_name([\\u0021-\\u007E&^:]+):" reg_filed_value "\r\n)*\r\n"
+    test("P /aa?:: HTTP/1.1\r\nr--r: qwe\r\n\r\n", reg_HTTP_message, MatchInfo(
+        {{0, 0}, {1, 1}, {2, 2}, {3, 5}, {4, 6}, {5, 8}, {6, 14}, {7, 17}, {8, 19}, {9, 23}, {10, 25}, {11, 28}}, {}));
+    test("d3", "[abc]3", MatchInfo());
+
     boba({{"", true}, {"a", false}}, "");
     boba({{"", true}, {"a", true}, {"aab", true}, {"aac", false}, {"c", false}, {"abbababa", true}}, "[ab]*");
     test("", "", MatchInfo({}, {}));
@@ -58,10 +69,8 @@ int main() {
     test("1b", "1\\<b", MatchInfo({}, {}));
     test("bababbaa", "[ab]*", MatchInfo({}, {}));
     test("bababbaa", "!dfa;[ab]*", MatchInfo({}, {}));
-    test("d3", "[abc]3", MatchInfo());
     test("a3", "[abc]3", MatchInfo({}, {}));
     test("abba", "!select{M{max}}a#M(b*)a", MatchInfo({}, {1, 3}));
-
     test("LINE\r\nFirst:Second\r\nThird:12\r\n\r\n",
         "!dfa;!select{fieldname{ca}fieldbody{ca}}LINE\r\n(#fieldname([\\u0021-\\u007E&^:]+):#fieldbody([\\u0000-\\u007F&^\r\n]*)\r\n)*\r\n",
         MatchInfo({{0, 6}, {1, 11}, {2, 12}, {3, 18}, {0, 20}, {1, 25}, {2, 26}, {3, 28}}, {20, 25, 26, 28}));
diff --git a/src/libregexis024tools/stringmatching.cpp b/src/libregexis024tools/stringmatching.cpp
index a5a7cf4..5c271da 100644
--- a/src/libregexis024tools/stringmatching.cpp
+++ b/src/libregexis024tools/stringmatching.cpp
@@ -48,6 +48,9 @@ namespace regexis024 {
                 return -1;
             }
             cur_text_pos += adj;
+            if (cur_text_pos < input.size() && !vm.haveSurvivors()) {
+                return 0;
+            }
         }
         assert(vm.isUsable());
         if (vm.isMatched()) {
diff --git a/src/libregexis024vm/libregexis024vm_context.cpp b/src/libregexis024vm/libregexis024vm_context.cpp
index 503a7d4..7d9de4e 100644
--- a/src/libregexis024vm/libregexis024vm_context.cpp
+++ b/src/libregexis024vm/libregexis024vm_context.cpp
@@ -162,6 +162,8 @@ namespace regexis024 {
         if (ctx.initialized){
             ctx.timer = 0;
             ctx.CAN_total = 0;
+            ctx.passed_bytes = 0;
+            ctx.passed_chars = 0;
             while (!ctx.READ_halted_stack_new.empty()){
                 Thread& thread = ctx.READ_halted_slots[ctx.READ_halted_stack_new.pop()];
                 assert(thread.slot_occupation_status & SLOT_OCCUPIED);