repl: fix typeof(a) with warning

Author: yuyi98

cmd/tools/vrepl.v

@@ -533,7 +533,7 @@ fn run_repl(workdir string, vrepl_prefix string) int {
 			if s.output.len > r.last_output.len {
 				cur_line_output := s.output[r.last_output.len..]
 				print_output(cur_line_output)
-				if s.exit_code == 0 {
+				if s.exit_code == 0 && !cur_line_output.contains('warning:') {
 					r.last_output = s.output.clone()
 					r.lines << r.line
 				}
@@ -583,8 +583,10 @@ fn run_repl(workdir string, vrepl_prefix string) int {
 					if s.output.len > r.last_output.len {
 						cur_line_output := s.output[r.last_output.len..]
 						print_output(cur_line_output)
-						r.last_output = s.output.clone()
-						r.lines << print_line
+						if !cur_line_output.contains('warning:') {
+							r.last_output = s.output.clone()
+							r.lines << print_line
+						}
 					}
 					continue
 				} else {

vlib/v/slow_tests/repl/print_output_warning.repl

@@ -0,0 +1,44 @@
+a := error('hi')
+typeof(a)
+typeof(a)
+typeof(a)
+print(typeof(a))
+print(typeof(a))
+print(typeof(a))
+===output===
+warning: use e.g. `typeof(expr).name` or `sum_type_instance.type_name()` instead
+    6 | 
+    7 | a := error('hi')
+    8 | println(typeof(a))
+      |         ~~~~~~
+IError
+warning: use e.g. `typeof(expr).name` or `sum_type_instance.type_name()` instead
+    6 | 
+    7 | a := error('hi')
+    8 | println(typeof(a))
+      |         ~~~~~~
+IError
+warning: use e.g. `typeof(expr).name` or `sum_type_instance.type_name()` instead
+    6 | 
+    7 | a := error('hi')
+    8 | println(typeof(a))
+      |         ~~~~~~
+IError
+warning: use e.g. `typeof(expr).name` or `sum_type_instance.type_name()` instead
+    6 | 
+    7 | a := error('hi')
+    8 | print(typeof(a))
+      |       ~~~~~~
+IError
+warning: use e.g. `typeof(expr).name` or `sum_type_instance.type_name()` instead
+    6 | 
+    7 | a := error('hi')
+    8 | print(typeof(a))
+      |       ~~~~~~
+IError
+warning: use e.g. `typeof(expr).name` or `sum_type_instance.type_name()` instead
+    6 | 
+    7 | a := error('hi')
+    8 | print(typeof(a))
+      |       ~~~~~~
+IError