diff --git a/include/tlibc/collections/List.h b/include/tlibc/collections/List.h
index 48e621f..8173cb4 100755
--- a/include/tlibc/collections/List.h
+++ b/include/tlibc/collections/List.h
@@ -7,14 +7,14 @@ typedef struct List {
     u32 allocated_size;
 } List;
 
-#define List_construct(L, T, OCCUPIED_COUNT, ALLOCATED_COUNT) \
-    List_construct_size(L, (OCCUPIED_COUNT) * sizeof(T), (ALLOCATED_COUNT) * sizeof(T))
+#define List_construct(DATA_PTR, T, OCCUPIED_COUNT, ALLOCATED_COUNT) \
+    List_construct_size(DATA_PTR, (OCCUPIED_COUNT) * sizeof(T), (ALLOCATED_COUNT) * sizeof(T))
 
-static inline List List_construct_size(void* data_ptr, u32 size, u32 allocated_size) {
-    return (List){ .data = data_ptr, .size = size, .allocated_size = allocated_size };
+static inline List List_construct_size(void* data_ptr, u32 occupied_size, u32 allocated_size) {
+    return (List){ .data = data_ptr, .size = occupied_size, .allocated_size = allocated_size };
 }
 
-#define List_alloc(L, T, INITIAL_COUNT) List_alloc_size(L, (INITIAL_COUNT) * sizeof(T))
+#define List_alloc(T, INITIAL_COUNT) List_alloc_size((INITIAL_COUNT) * sizeof(T))
 List List_alloc_size(u32 initial_size);
 
 void* List_expand(List* ptr, u32 expansion_size);
diff --git a/include/tlibc/errors.h b/include/tlibc/errors.h
index 9dc67e8..0c4918c 100755
--- a/include/tlibc/errors.h
+++ b/include/tlibc/errors.h
@@ -1,9 +1,34 @@
 #pragma once
 #include "std.h"
-#include "string/cstr.h"
+#include "string/str.h"
+#include "collections/List.h"
+
+typedef struct ErrorCallPos {
+    i32 line;
+    str file; 
+    str func;
+} ErrorCallPos;
+#define ErrorCallPos_here() (ErrorCallPos){\
+    .line = __LINE__,\
+    .file = str_construct((char*)(void*)__FILE__, sizeof(__FILE__), true),\
+    .func = str_construct((char*)(void*)__func__, sizeof(__func__), true)\
+}
+
+typedef struct Error {
+    str msg;
+    bool is_msg_on_heap;
+    /* List<ErrorCallPos> */
+    List call_stack;
+} Error;
+
+Error* Error_create(const char* msg, bool is_msg_on_heap, ErrorCallPos);
+void Error_destroy(Error* e);
+void Error_addCallPos(Error* e, ErrorCallPos p);
+str Error_toStr(Error* e);
+void Error_printAndExit(Error* e) __attribute__ ((__noreturn__));
 
 typedef struct Result_ {
-    cstr error;
+    Error* error;
     union {
         u64 v_u64;
         i64 v_i64;
@@ -15,12 +40,22 @@ typedef struct Result_ {
 
 #define Result(T) Result_
 
-char* _genErrorMessage(cstr file, i32 line, cstr func, char* msg, bool free_msg);
 
-
-#define _genErrorMessageHere(MSG, FREE_MSG) \
-    _genErrorMessage(__FILE__, __LINE__, __func__, MSG, FREE_MSG)
-
-#define RESULT_ERROR(MSG, FREE_MSG) (Result_){ .error = _genErrorMessageHere(MSG, FREE_MSG) }
+#define RESULT_ERROR(MSG, IS_MSG_ON_HEAP) (Result_){ .error = Error_create(MSG, IS_MSG_ON_HEAP, ErrorCallPos_here()) }
 #define RESULT_VOID (Result_){ .error = NULL }
 #define RESULT_VALUE(TYPE, V) (Result_){ .error = NULL, .v_##TYPE = V }
+
+#define try(VAR, RSLT_CALL, DEFER_CODE) \
+    Result_ VAR = RSLT_CALL;\
+    if(VAR.error){\
+        Error_addCallPos(VAR.error, ErrorCallPos_here());\
+        DEFER_CODE;\
+        return VAR;\
+    };
+
+#define try_fatal(VAR, RSLT_CALL, DEFER_CODE) \
+    Result_ VAR = RSLT_CALL;\
+    if(VAR.error){\
+        DEFER_CODE;\
+        Error_printAndExit(VAR.error);\
+    };
diff --git a/src/errors.c b/src/errors.c
index 846b57c..7611471 100755
--- a/src/errors.c
+++ b/src/errors.c
@@ -1,10 +1,53 @@
 #include "tlibc/errors.h"
+#include "tlibc/string/StringBuilder.h"
 
 #define ERRMSG_LENGTH 1024
 
-char* _genErrorMessage(cstr file, i32 line, cstr func, char* msg, bool free_msg){
-    char* result = sprintf_malloc(1024, "[%s:%i] %s() throwed error: %s", file, line, func, msg);
-    if(free_msg)
-        free(msg);
-    return result;
+Error* Error_create(const char* msg, bool is_msg_on_heap, ErrorCallPos){
+    Error* e = (Error*)malloc(sizeof(Error));
+    e->msg = str_construct((char*)(void*)msg, strlen(msg), true);
+    e->is_msg_on_heap = is_msg_on_heap;
+    e->call_stack = List_alloc(ErrorCallPos, 1);
+    return e;
+}
+
+void Error_destroy(Error* e){
+    if(e->is_msg_on_heap)
+        free(e->msg.data);
+    free(e->call_stack.data);
+}
+
+void Error_addCallPos(Error* e, ErrorCallPos p){
+    List_push(&e->call_stack, ErrorCallPos, p);
+}
+
+str Error_toStr(Error* e){
+    u32 len = List_len(&e->call_stack, ErrorCallPos);
+    StringBuilder b = StringBuilder_alloc(e->msg.size + 80 * len);
+    
+    StringBuilder_append_str(&b, STR("Error: "));
+    StringBuilder_append_str(&b, e->msg);
+    for(u32 i = 0; i < len; i++){
+        ErrorCallPos* ep = (ErrorCallPos*)e->call_stack.data + i;
+        StringBuilder_append_str(&b, STR("\n  at "));
+        StringBuilder_append_str(&b, ep->file);
+        StringBuilder_append_char(&b, ':');
+        StringBuilder_append_i64(&b, ep->line);
+        StringBuilder_append_char(&b, ' ');
+        StringBuilder_append_str(&b, ep->func);
+        StringBuilder_append_str(&b, STR("()\n"));
+    }
+
+    return StringBuilder_getStr(&b);
+}
+
+
+void Error_printAndExit(Error* e){
+    Error_addCallPos(e, ErrorCallPos_here());\
+    str e_str = Error_toStr(e);
+    printfe("%s\n", e_str.data);
+    free(e_str.data);
+    Error_destroy(e);
+    free(e);
+    exit(111);
 }