cgen: fix dumping array of reference (vlang#21694)

vlib/v/gen/c/dumpexpr.v

@@ -55,7 +55,7 @@ fn (mut g Gen) dump_expr(node ast.DumpExpr) {
 		name = name[3..]
 	}
 	dump_fn_name := '_v_dump_expr_${name}' +
-		(if expr_type.is_ptr() { '_ptr'.repeat(expr_type.nr_muls()) } else { '' })
+		(if expr_type.is_ptr() { '__ptr'.repeat(expr_type.nr_muls()) } else { '' })
 	g.write(' ${dump_fn_name}(${ctoslit(fpath)}, ${line}, ${sexpr}, ')
 	if expr_type.has_flag(.shared_f) {
 		g.write('&')
@@ -156,7 +156,7 @@ fn (mut g Gen) dump_expr_definitions() {
 			str_dumparg_ret_type = str_dumparg_type
 		}
 		dump_fn_name := '_v_dump_expr_${name}' +
-			(if is_ptr { '_ptr'.repeat(typ.nr_muls()) } else { '' })
+			(if is_ptr { '__ptr'.repeat(typ.nr_muls()) } else { '' })
 
 		// protect against duplicate declarations:
 		if dump_already_generated_fns[dump_fn_name] {

vlib/v/slow_tests/inout/dump_array_of_ref.out

@@ -0,0 +1,10 @@
+[vlib/v/slow_tests/inout/dump_array_of_ref.vv:6] parents: &[Balise{
+    a: 11
+}, Balise{
+    a: 22
+}]
+[vlib/v/slow_tests/inout/dump_array_of_ref.vv:10] stack: [&Balise{
+    a: 10
+}, &Balise{
+    a: 20
+}]

vlib/v/slow_tests/inout/dump_array_of_ref.vv

@@ -0,0 +1,16 @@
+struct Balise {
+	a int
+}
+
+fn escape_tag(mut parents []Balise) {
+	dump(parents)
+	mut stack := []&Balise{}
+	stack << &Balise{10}
+	stack << &Balise{20}
+	dump(stack)
+}
+
+fn main() {
+	mut bal := [Balise{11}, Balise{22}]
+	escape_tag(mut bal)
+}