v.debug: fix struct value initialization of an interface field (fix #25941) (fix #25924) (#25946)

Author: Krchi

vlib/v/debug/tests/interface_var.expect

@@ -5,5 +5,12 @@ expect "Break on * interface_var in ${test_file}:14\r\n"
 expect "${test_file}:14 vdbg> "
 send "p a\n"
 expect "a = Test{\r\n    a: MySum(true)"
+send "c\n"
+expect "Break on * struct_to_interface_field in ${test_file}:33\r\n"
+expect "${test_file}:33 vdbg> "
+send "p t1\n"
+expect "t1 = Test{\r\n    a: MySum(false)"
+send "p t2\n"
+expect "t2 = Test{\r\n    a: MySum(false)"
 send "q\n"
 expect eof

vlib/v/debug/tests/interface_var.vv

@@ -17,6 +17,23 @@ fn interface_var(a ITest) {
 	}
 }
 
+struct MyTest {
+	t ITest
+}
+
+fn struct_to_interface_field() {
+	t1 := Test{}
+	_ := MyTest{
+		t: t1
+	}
+	mut t2 := Test{}
+	_ := MyTest{
+		t: t2
+	}
+	$dbg;
+}
+
 fn main() {
 	interface_var(Test{ a: true })
+	struct_to_interface_field()
 }

vlib/v/gen/c/cgen.v

@@ -4832,7 +4832,7 @@ fn (mut g Gen) debugger_stmt(node ast.DebuggerStmt) {
 							'&'
 						} else if !str_method_expects_ptr && obj.typ.is_ptr() {
 							'*'.repeat(obj.typ.nr_muls())
-						} else if !str_method_expects_ptr && obj_sym.is_heap() {
+						} else if !str_method_expects_ptr && (obj_sym.is_heap() || obj.is_auto_heap) {
 							'*'
 						} else if obj.is_auto_heap && var_typ.is_ptr() && str_method_expects_ptr {
 							'*'