add detail crash info

nasal.h

@@ -20,25 +20,6 @@
 #include <vector>
 #include <unordered_map>
 
-class nasal_err
-{
-private:
-    uint32_t error;
-    std::string stage;
-public:
-    nasal_err(
-        const uint32_t _error,
-        const std::string _stage
-        ):error(_error),stage(_stage){}
-    void unwarp(const std::string& error_file)
-    {
-        if(!error)
-            return;
-        std::cout<<"["<<stage<<"] in <"<<error_file<<">: error(s) occurred,stop.\n";
-        std::exit(1);
-    }
-};
-
 /*
     check if a string can be converted to a number
     if this string cannot be converted to a number,it will return nan