v.parser: fix -autofree for script mode programs that do not have explicit `fn main(){}`

vlib/v/parser/parser.v

@@ -575,10 +575,12 @@ pub fn (mut p Parser) top_stmt() ast.Stmt {
 			else {
 				p.inside_fn = true
 				if p.pref.is_script && !p.pref.is_test {
+					p.open_scope()
 					mut stmts := []ast.Stmt{}
 					for p.tok.kind != .eof {
 						stmts << p.stmt(false)
 					}
+					p.close_scope()
 					return ast.FnDecl{
 						name: 'main.main'
 						mod: 'main'

vlib/v/tests/valgrind/simple_interpolation.v

@@ -0,0 +1,5 @@
+fn main() {
+	v := 't'
+	s := '${v}.tmp'
+	println(s)
+}

vlib/v/tests/valgrind/simple_interpolation_script_mode.v

@@ -0,0 +1,5 @@
+v := 't'
+
+s := '${v}.tmp'
+
+println(s)

vlib/v/tests/valgrind/simple_interpolation_script_mode_more_scopes.v

@@ -0,0 +1,7 @@
+{
+	{
+		v := 't'
+		s := '${v}.tmp'
+		println(s)
+	}
+}

vlib/v/tests/valgrind/valgrind_test.v

@@ -78,6 +78,7 @@ fn test_all() {
 			bench.fail()
 			eprintln(bench.step_message_fail('file: $test could not be compiled.'))
 			eprintln(res.output)
+			eprintln('You can reproduce the failure with:\n$compile_cmd')
 			continue
 		}
 		if test in skip_valgrind_files {
@@ -94,6 +95,7 @@ fn test_all() {
 			bench.fail()
 			eprintln(bench.step_message_fail('failed valgrind check for ${util.bold(test)}'))
 			eprintln(valgrind_res.output)
+			eprintln('You can reproduce the failure with:\n$compile_cmd && $valgrind_cmd')
 			continue
 		}
 		bench.ok()