gzip: invalid length and checksum checks

[Casper64]

Describe the bug

When decompressing a gzipped file of ~5KB the length and checksum verifications fail.

Reproduction Steps

module main

import compress.gzip
import os

fn main() {
	compressed := os.read_bytes('in.xml.gz')!
	println(compressed[0..100])

	decoded := gzip.decompress(compressed)!
	println(decoded.bytestr())
}

Expected Behavior

No errors

Current Behavior

V panic: result not set (length verification failed, got 4548, expected 3289448448)

Possible Solution

The decompression algorithm is correct, because when I remove the length and checksum check I can see that result is correct.

The following code seems to be overflowing/underflowing

(u32(data[data.len - 4]) << 24) | (u32(data[data.len - 3]) << 16) | (u32(data[data.len - 2]) << 8) | data[data.len - 1]

gzip.v

Additional Information/Context

No response

V version

0.4.2

Environment details (OS name and version, etc.)

V full version: V 0.4.2 25777bd.ad935ca
OS: Linux

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