diff --git a/cmd/tools/repeat.v b/cmd/tools/repeat.v
index c5a19e9c98..0df1a4d197 100644
--- a/cmd/tools/repeat.v
+++ b/cmd/tools/repeat.v
@@ -62,10 +62,13 @@ fn new_aints(ovals []int, extreme_mins int, extreme_maxs int) Aints {
 	mut imin := math.max_i32
 	mut imax := -math.max_i32
 	// discard the extremes:
-	mut vals := ovals.clone()
+	mut vals := []int{}
+	for x in ovals {
+		vals << x
+	}
 	vals.sort()
 	if vals.len > extreme_mins + extreme_maxs {
-		vals = vals[extreme_mins..vals.len - extreme_maxs]
+		vals = vals[extreme_mins..vals.len - extreme_maxs].clone()
 	} else {
 		vals = []
 	}
@@ -152,7 +155,10 @@ fn (mut context Context) parse_options() {
 		exit(1)
 	}
 	context.commands = context.expand_all_commands(commands)
-	context.results = []CmdResult{len: context.commands.len, init: CmdResult{}}
+	context.results = []CmdResult{len: context.commands.len, cap: 100, init: CmdResult{
+		outputs: []string{cap: 1000}
+		timings: []int{cap: 1000}
+	}}
 	if context.use_newline {
 		context.cline = '\n'
 		context.cgoback = '\n'
@@ -170,7 +176,8 @@ fn (mut context Context) expand_all_commands(commands []string) []string {
 	mut all_commands := []string{}
 	for cmd in commands {
 		maincmd := context.cmd_template.replace('{T}', cmd)
-		mut substituted_commands := [maincmd]
+		mut substituted_commands := []string{}
+		substituted_commands << maincmd
 		for paramk, paramlist in context.cmd_params {
 			for paramv in paramlist {
 				mut new_substituted_commands := []string{}
@@ -178,10 +185,14 @@ fn (mut context Context) expand_all_commands(commands []string) []string {
 					scmd := cscmd.replace(paramk, paramv)
 					new_substituted_commands << scmd
 				}
-				substituted_commands << new_substituted_commands
+				for sc in new_substituted_commands {
+					substituted_commands << sc
+				}
 			}
 		}
-		all_commands << substituted_commands
+		for sc in substituted_commands {
+			all_commands << sc
+		}
 	}
 	mut unique := map[string]int{}
 	for x in all_commands {
@@ -228,8 +239,10 @@ fn (mut context Context) run() {
 					eprintln('${i:10} non 0 exit code for cmd: $cmd')
 					continue
 				}
-				context.results[icmd].outputs << res.output.trim_right('\r\n').replace('\r\n',
-					'\n').split('\n')
+				trimed_output := res.output.trim_right('\r\n')
+				trimed_normalized := trimed_output.replace('\r\n', '\n')
+				lines := trimed_normalized.split('\n')
+				context.results[icmd].outputs << lines
 				context.results[icmd].timings << duration
 				sum += duration
 				runs++
@@ -296,10 +309,12 @@ fn (mut context Context) show_diff_summary() {
 	println('Summary (commands are ordered by ascending mean time), after $context.series series of $context.count repetitions:')
 	base := context.results[0].atiming.average
 	mut first_cmd_percentage := f64(100.0)
+	mut first_marker := ''
 	for i, r in context.results {
+		first_marker = ' '
 		cpercent := (r.atiming.average / base) * 100 - 100
-		first_marker := if r.icmd == 0 { util.bold('>') } else { ' ' }
 		if r.icmd == 0 {
+			first_marker = util.bold('>')
 			first_cmd_percentage = cpercent
 		}
 		println(' $first_marker${(i + 1):3} | ${cpercent:5.1f}% slower | ${r.cmd:-57s} | $r.atiming')
diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index 45c771ea4d..bdc860d612 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -5715,7 +5715,7 @@ fn (mut g Gen) type_default(typ_ table.Type) string {
 	}
 	*/
 	match sym.name {
-		'string' { return '(string){.str=(byteptr)""}' }
+		'string' { return '(string){.str=(byteptr)"", .is_lit=1}' }
 		'rune' { return '0' }
 		else {}
 	}
diff --git a/vlib/v/gen/c/fn.v b/vlib/v/gen/c/fn.v
index e82abcac46..0d8cb78409 100644
--- a/vlib/v/gen/c/fn.v
+++ b/vlib/v/gen/c/fn.v
@@ -478,9 +478,10 @@ fn (mut g Gen) method_call(node ast.CallExpr) {
 	if node.receiver_type == 0 {
 		g.checker_bug('CallExpr.receiver_type is 0 in method_call', node.pos)
 	}
-	typ_sym := g.table.get_type_symbol(g.unwrap_generic(node.receiver_type))
-	mut receiver_type_name := util.no_dots(g.cc_type(g.unwrap_generic(node.receiver_type),
-		false))
+	unwrapped_rec_type := g.unwrap_generic(node.receiver_type)
+	typ_sym := g.table.get_type_symbol(unwrapped_rec_type)
+	rec_cc_type := g.cc_type(unwrapped_rec_type, false)
+	mut receiver_type_name := util.no_dots(rec_cc_type)
 	if typ_sym.kind == .interface_ && (typ_sym.info as table.Interface).defines_method(node.name) {
 		// Speaker_name_table[s._interface_idx].speak(s._object)
 		$if debug_interface_method_call ? {
@@ -578,6 +579,10 @@ fn (mut g Gen) method_call(node ast.CallExpr) {
 		// && rec_sym.name == 'array' && receiver_name.starts_with('array') {
 		// `array_byte_clone` => `array_clone`
 		receiver_type_name = 'array'
+		if false && node.name == 'free' && typ_sym.has_method(node.name) {
+			// TODO: allow for more specific overrides of array .free() like `pub fn (x []string) free() {`
+			receiver_type_name = g.typ(unwrapped_rec_type).trim('*')
+		}
 		if node.name in ['last', 'first', 'pop'] {
 			return_type_str := g.typ(node.return_type)
 			has_cast = true