diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index 2102c348c3..1d7c54ec37 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -368,10 +368,10 @@ pub fn (b []byte) hex() string {
 	mut ptr := &hex[0]
 	for i := 0; i < b.len; i++ {
 		// QTODO
-		ptr += C.sprintf(ptr as charptr, '%02x', b[i])
+		ptr += C.sprintf(ptr, '%02x', b[i])
 	}
-	return hex as string
-	//return string(hex)
+	//return hex as string
+	return string(hex)
 }
 
 // copy copies the `src` byte array elements to the `dst` byte array.
diff --git a/vlib/builtin/builtin_nix.v b/vlib/builtin/builtin_nix.v
index 4e0d5a50a9..150d819f8b 100644
--- a/vlib/builtin/builtin_nix.v
+++ b/vlib/builtin/builtin_nix.v
@@ -64,7 +64,7 @@ fn print_backtrace_skipping_top_frames_mac(skipframes int) bool {
 	$if macos {
 		buffer := [100]byteptr
 		nr_ptrs := C.backtrace(buffer, 100)
-		C.backtrace_symbols_fd(&buffer[skipframes], nr_ptrs - skipframes, 1)
+		backtrace_symbols_fd(&buffer[skipframes], nr_ptrs - skipframes, 1)
 	}
 	return true
 }
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 31338aae02..a06ec0cc7c 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -157,7 +157,7 @@ pub fn (c &Checker) call_expr(call_expr ast.CallExpr) table.TypeRef {
 				c.error('too few arguments in call to `$fn_name`', call_expr.pos)
 			}
 			else if call_expr.args.len > f.args.len {
-				c.error('too many arguments in call to `$fn_name`', call_expr.pos)
+				c.error('too many arguments in call to `$fn_name` ($call_expr.args.len instead of $f.args.len)', call_expr.pos)
 			}
 		}
 		for i, arg in f.args {
@@ -206,6 +206,7 @@ pub fn (c &Checker) selector_expr(selector_expr ast.SelectorExpr) table.TypeRef
 				return c.table.type_ref(table.int_type_idx)
 			}
 		}
+		.string {}
 		else {
 			c.error('`$typ.typ.name` is not a struct', selector_expr.pos)
 		}
diff --git a/vlib/v/parser/parser.v b/vlib/v/parser/parser.v
index 3d8fa0e54c..33d6e30051 100644
--- a/vlib/v/parser/parser.v
+++ b/vlib/v/parser/parser.v
@@ -466,12 +466,34 @@ pub fn (p mut Parser) name_expr() (ast.Expr,table.TypeRef) {
 		p.check_name()
 		return node,typ
 	}
-	// fn call
+	// fn call or type cast
 	if p.peek_tok.kind == .lpar {
-		println('calling $p.tok.lit')
-		x,ti2 := p.call_expr() // TODO `node,typ :=` should work
-		node = x
-		typ = ti2
+		name := p.tok.lit
+		// type cast. TODO: finish
+		if name in p.table.type_idxs {
+			// ['byte', 'string', 'int']
+			// SKIP FOR NOW
+			mut par_d := 0
+			for {
+				if p.tok.kind == .lpar {
+					par_d++
+				}
+				if p.tok.kind == .rpar {
+					par_d--
+					if par_d == 0 {
+						p.next()
+						break
+					}
+				}
+				p.next()
+			}
+		}
+		else {
+			println('calling $p.tok.lit')
+			x,ti2 := p.call_expr() // TODO `node,typ :=` should work
+			node = x
+			typ = ti2
+		}
 	}
 	// struct init
 	else if p.peek_tok.kind == .lcbr && (p.tok.lit[0].is_capital() || p.tok.lit in ['array', 'string', 'ustring', 'mapnode', 'map']) && !p.tok.lit[p.tok.lit.len - 1].is_capital() {