diff --git a/Makefile b/Makefile
index c5b6c64..0c16c3e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-######       Build tasks       #######
+######      Building tasks     #######
 build_test: 
 	@build_scripts/build_test.sh
 
@@ -12,4 +12,4 @@ test:
 test_valgrind: 
 	@build_scripts/test_valgrind.sh
 
-all: build_test test
+all: build_test
diff --git a/build_scripts/build_lib.sh b/build_scripts/build_lib.sh
index 20604be..45bb44b 100644
--- a/build_scripts/build_lib.sh
+++ b/build_scripts/build_lib.sh
@@ -6,6 +6,5 @@ print "${CYAN}=============[build_lib]==============\n"
 clear_dir bin
 clear_dir obj
 compile_c "-O2 -fpic -shared" "$SRC_C tests/test_marshalling.c"
-compile_cpp "-flto -Wl,-soname,$LIB_FILE" "$SRC_CPP"
-link " " $LIB_FILE
-rm -rf $OBJDIR
+compile_cpp "-O2 -fpic -shared" "$SRC_CPP"
+link "-shared -O2 -fpic -flto -Wl,-soname,$LIB_FILE" "$LIB_FILE"
diff --git a/build_scripts/build_test.sh b/build_scripts/build_test.sh
index 18bee46..26bc10f 100644
--- a/build_scripts/build_test.sh
+++ b/build_scripts/build_test.sh
@@ -8,4 +8,3 @@ clear_dir obj
 compile_c "-O0 -g" "$SRC_C $TESTS_C"
 compile_cpp "-O0 -g" "$SRC_CPP $TESTS_CPP"
 link " " $TEST_FILE
-rm -rf $OBJDIR
diff --git a/build_scripts/functions.sh b/build_scripts/functions.sh
index 3aacfd1..ff45314 100644
--- a/build_scripts/functions.sh
+++ b/build_scripts/functions.sh
@@ -48,6 +48,12 @@ function link {
     print "${BLUE}outfile: ${GRAY}$outfile\n"
     local objects="$(find $OBJDIR -name *.o)"
     print "${BLUE}objects: ${GRAY}$objects\n"
-    $CMP_C $args -o $outfile $(echo $objects | tr '\n' ' ')
-    print "${GREEN}file $CYAN$outfile ${GREEN}created\n"
+    if $CMP_C $args -o $outfile $(echo $objects | tr '\n' ' ')
+    then 
+        print "${GREEN}file $CYAN$outfile ${GREEN}created\n"
+        rm -rf $OBJDIR
+    else
+        print "${RED}some error happened\n"
+        exit
+    fi
 }
diff --git a/src/Autoarr/Autoarr2.cpp b/src/Autoarr/Autoarr2.cpp
index acbf1be..2402c13 100644
--- a/src/Autoarr/Autoarr2.cpp
+++ b/src/Autoarr/Autoarr2.cpp
@@ -1,10 +1,10 @@
-#include "Autoarr2.hpp"
 //
 //
 //
 
+#include "Autoarr2.hpp"
+
 #define MAX_BLOCK_LENGTH_DEFAULT 64
-#define ALLOC_N_BLOCKS 1
 
 template<typename T>
 Autoarr2<T>::Autoarr2() {
@@ -21,7 +21,7 @@ Autoarr2<T>::Autoarr2(uint16 _max_block_length) : Autoarr2() {
 
 template<typename T>
 T *Autoarr2<T>::GetPtr(uint32 index) {
-    if(index>=Length) throwcpp(ERR_WRONGINDEX);
+    if(index>=Length) throwcpp_id(ERR_WRONGINDEX);
     return values[index/max_block_length]+index%max_block_length;
 }
 
@@ -38,15 +38,15 @@ void Autoarr2<T>::Set(uint32 index, T value) {
 template<typename T>
 void Autoarr2<T>::Add(T value) {
     if(!values){
-        values=malloc(ALLOC_N_BLOCKS*sizeof(T*));
+        values=malloc(sizeof(T*));
         goto create_block;
     }
     else if(block_length==max_block_length){
         block_length=0;
 create_block:
-        values=realloc((blocks_count+ALLOC_N_BLOCKS)*sizeof(T*));
-        blocks_count+=ALLOC_N_BLOCKS;
+        values=realloc(values,(blocks_count+1)*sizeof(T*));
         values[blocks_count]=malloc(max_block_length*sizeof(T));
+        blocks_count++;
     }
 
     values[blocks_count-1][block_length]=value;
diff --git a/src/base/errors.c b/src/base/errors.c
index f5c317c..a2a2864 100644
--- a/src/base/errors.c
+++ b/src/base/errors.c
@@ -2,7 +2,7 @@
 #include "errors.h"
 #include "cptr.h"
 
-char* errname(err_t err){
+char* errname(ErrorId err){
     switch(err){
         case SUCCESS: return "SUCCESS";
         case ERR_MAXLENGTH: return "ERR_MAXLENGTH";
diff --git a/src/base/errors.cpp b/src/base/errors.cpp
index ec1e963..7614c5f 100644
--- a/src/base/errors.cpp
+++ b/src/base/errors.cpp
@@ -1,9 +1,9 @@
 #include "errors.hpp"
 
-void throwcpp(err_t eid){
-    throwcpp(errname(eid));
+void throwcpp_id(ErrorId eid){
+    throwcpp_msg(errname(eid));
 }
 
-void throwcpp(char* emsg){
+void throwcpp_msg(char* emsg){
     __EXIT(emsg);
 }
\ No newline at end of file
diff --git a/src/base/errors.h b/src/base/errors.h
index 19da077..b536038 100644
--- a/src/base/errors.h
+++ b/src/base/errors.h
@@ -7,12 +7,12 @@ extern "C" {
 #include "std.h"
 #include "types.h"
 
-typedef enum err_t {
+typedef enum ErrorId {
     SUCCESS, // not an error 
     ERR_MAXLENGTH, ERR_WRONGTYPE, ERR_WRONGINDEX, ERR_NOTIMPLEMENTED, ERR_NULLPTR, ERR_ENDOFSTR
-} err_t;
+} ErrorId;
 
-char* errname(err_t err);
+char* errname(ErrorId err);
 
 char* __genErrMsg(const char* errmsg, const char* srcfile, int line, const char* funcname);
 char* __extendErrMsg(const char* errmsg, const char* srcfile, int line, const char* funcname);
@@ -21,8 +21,10 @@ typedef struct Maybe{
     Unitype value;
     char* errmsg;
 } Maybe;
+
 // return it if func doesn't return anything
-static const Maybe MaybeNull={.value.type=Null, .value.VoidPtr=NULL,.errmsg=NULL};
+//                            .value  .errmsg
+static const Maybe MaybeNull={UniNull, NULL};
 
 void Maybe_free(Maybe e);
 void printMaybe(Maybe e);
diff --git a/src/base/errors.hpp b/src/base/errors.hpp
index 93cdb3c..ad19bd7 100644
--- a/src/base/errors.hpp
+++ b/src/base/errors.hpp
@@ -3,6 +3,6 @@
 #ifdef __cplusplus
 #include "errors.h"
 
-void throwcpp(err_t eid);
-void throwcpp(char* emsg);
+void throwcpp_id(ErrorId eid);
+void throwcpp_msg(char* emsg);
 #endif
\ No newline at end of file