Issue with code generation

[Ekopalypse]

Using the code provided below results in unexpected behavior.
Current workaround is to use the byte array .clone() function.

V version:
OS:

OS: windows, Microsoft Windows 7 Professional v7601 64-bit
Processor: 4 cpus, 64bit, little endian, Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz
CC version: N/A

vroot: D:\ProgramData\Compiler\v
vexe: D:\ProgramData\Compiler\v\v.exe
vexe mtime: 2020-10-11 19:14:05
is vroot writable: true
V full version: V 0.1.29 230e986

Git version: git version 2.19.1.windows.1
Git vroot status: 0.1.29-567-g230e9868
.git/config present: true
thirdparty/tcc: N/A

What did you do?

import crypto.md5
import crypto.sha1

const (
	npad      = []byte{len: 256, init: 0}
)


fn encode(hash_func fn(bytes []byte) []byte, blocksize int, key []byte, text []byte) {
	mut b_key := []byte{}
	if key.len <= blocksize { 
		b_key = key  //.clone()
	} else { 
		b_key = hash_func(key) 
	}

	println(b_key)

	if b_key.len < blocksize {
		b_key << npad[..blocksize - b_key.len]
	}
}

fn main() {
	keys := [[byte(0xb), 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb]]
	text := ['Hi There'.bytes()]

	for i, key in keys {
		encode(md5.sum, md5.block_size, key, text[i])
		encode(sha1.sum, sha1.block_size, key, text[i])
	}
}

What did you expect to see?

[`\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`]
[`\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`]

What did you see instead?

[`\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`, `\v`]
[0xc0, 0, `\0`, `\0`, `\0`, `\0`, `\0`, `\0`, X, 0x01, -, `\0`, `\0`, `\0`, `\0`, `\0`]

[crthpl]

Duplicate of #10011