diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index c778946277..d8cdd8315b 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -13,6 +13,7 @@ import v.util
 import v.depgraph
 import term
 
+// NB: keywords after 'new' are reserved in C++
 const (
 	c_reserved = ['delete', 'exit', 'unix', 'error', 'calloc', 'malloc', 'free', 'panic', 'auto',
 		'char',
@@ -37,7 +38,6 @@ const (
 		'void',
 		'volatile',
 		'while',
-		// C++ keywords
 		'new',
 		'namespace',
 		'class',
@@ -2500,7 +2500,22 @@ fn (mut g Gen) write_init_function() {
 			g.writeln('array_free(&_const_os__args);')
 			g.writeln('string_free(&_const_os__wd_at_startup);')
 		}
+		//
+		g.writeln('array_free(&_const_math__bits__de_bruijn32tab);')
+		g.writeln('array_free(&_const_math__bits__de_bruijn64tab);')
+		g.writeln('array_free(&_const_math__bits__ntz_8_tab);')
+		g.writeln('array_free(&_const_math__bits__pop_8_tab);')
+		g.writeln('array_free(&_const_math__bits__rev_8_tab);')
+		g.writeln('array_free(&_const_math__bits__len_8_tab);')
+		g.writeln('array_free(&_const_strconv__ftoa__ten_pow_table_32);')
+		g.writeln('array_free(&_const_strconv__ftoa__ten_pow_table_64);')
 		g.writeln('array_free(&_const_strconv__ftoa__powers_of_10);')
+		g.writeln('array_free(&_const_strconv__ftoa__pow5_split_32);')
+		g.writeln('array_free(&_const_strconv__ftoa__pow5_inv_split_32);')
+		g.writeln('array_free(&_const_strconv__ftoa__pow5_split_64);')
+		g.writeln('array_free(&_const_strconv__ftoa__pow5_inv_split_64);')
+		g.writeln('array_free(&_const_strconv__dec_round);')
+		//
 		g.writeln('}')
 		if g.pref.printfn_list.len > 0 && '_vcleanup' in g.pref.printfn_list {
 			println(g.out.after(fn_vcleanup_start_pos))
@@ -3833,7 +3848,7 @@ fn (mut g Gen) gen_str_for_varg(styp, str_fn_name string, has_str_method bool) {
 	g.auto_str_funcs.writeln('\tfor(int i=0; i<it.len; i++) {')
 	if has_str_method {
 		g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${str_fn_name}(it.args[i]));')
-	}else{
+	} else {
 		// autogenerated str methods take the indent level as a second argument:
 		g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, ${str_fn_name}(it.args[i], 0));')
 	}