diff --git a/src/ast/ast.colgm b/src/ast/ast.colgm
index 84c1ebd..a20f847 100644
--- a/src/ast/ast.colgm
+++ b/src/ast/ast.colgm
@@ -23,6 +23,7 @@ pub enum ast_kind {
     ast_init_pair,
     ast_initializer,
     ast_call_path,
+    ast_call_id,
     ast_call,
     ast_assignment,
     ast_type_def,
diff --git a/src/err/report.colgm b/src/err/report.colgm
index 9c1e210..c8479b4 100644
--- a/src/err/report.colgm
+++ b/src/err/report.colgm
@@ -22,6 +22,8 @@ impl file_lines {
     }
 
     pub func delete(self) {
+        io::stderr().out("[").green().out("report").reset()
+                    .out("] delete file_lines::source\n");
         for (var index = 0; index < self->size; index += 1) {
             self->source[index].delete();
         }
@@ -90,14 +92,8 @@ impl report {
         self->filename.clear();
         self->filename.append_i8_vec(filename);
 
-        var another = str::new();
-        io::stdout().out("read into report::another\n");
-        readfile_into_string(filename, another);
-        io::stdout().out("\n");
         var source = str::new();
-        io::stdout().out("read into report::source\n");
         readfile_into_string(filename, source);
-        io::stdout().out("\n");
 
         var tmp = str::new();
         for (var pos = 0 => u64; pos < source->size; pos += 1 => u64) {
diff --git a/src/lexer.colgm b/src/lexer.colgm
index 7fdb9e6..7d0dea3 100644
--- a/src/lexer.colgm
+++ b/src/lexer.colgm
@@ -890,15 +890,27 @@ impl lexer {
         }
     }
 
+    func generate_eof_token(self) {
+        var eof_span = span::new();
+        eof_span->file.copy_const(self->filename.c_str);
+        eof_span->begin_line = self->line;
+        eof_span->begin_column = self->column;
+        eof_span->end_line = self->line;
+        eof_span->end_column = self->column;
+        self->toks->append(
+            tok_kind::tok_eof,
+            str::new()->append_i8_vec("<eof>"),
+            eof_span
+        );
+    }
+
     pub func scan(self, filename: i8*) {
         self->filename.clear();
         self->filename.copy_const(filename);
         self->err->load_file_source(filename);
 
         var src = str::new();
-        io::stdout().out("read into lexer::scan::src\n");
         readfile_into_string(filename, src);
-        io::stdout().out("\n");
 
         self->pos = 0 => u64;
         self->line = 0;
@@ -938,21 +950,11 @@ impl lexer {
             }
         }
 
-        var eof_span = span::new();
-        eof_span->file.copy_const(self->filename.c_str);
-        eof_span->begin_line = self->line;
-        eof_span->begin_column = self->column;
-        eof_span->end_line = self->line;
-        eof_span->end_column = self->column;
-        self->toks->append(
-            tok_kind::tok_eof,
-            str::new()->append_i8_vec("<eof>"),
-            eof_span
-        );
+        self->generate_eof_token();
 
+        // lifetime end for src
         src->delete();
         free(src => i8*);
-        io::stdout().out("delete lexer::scan::src\n");
     }
 
     pub func dump(self) {
diff --git a/src/std/io.colgm b/src/std/io.colgm
index 49dee7b..f044cc5 100644
--- a/src/std/io.colgm
+++ b/src/std/io.colgm
@@ -15,7 +15,8 @@ pub enum flag {
 
 pub func readfile_into_string(filename: i8*, dst: str*) -> i64 {
     io::stdout().out("remained info size: ")
-                .out_i64(dst->size => i64).out("\n");
+                .out_i64(dst->size => i64)
+                .out(" in 0x").out_hex(dst->c_str => i64).out("\n");
     var fd = open(filename, (flag::O_RDONLY => i32) | (flag::O_BINARY => i32));
     if (fd < (0 => i32)) {
         return fd => i64;