Null terminator always matched as last character in Regex

[lv37]

Describe the bug

import regex

fn main() {
	re1 := regex.regex_opt('^abc\0$')!
	assert re1.matches_string('abc') == false // should be false but is true
	assert re1.matches_string('abc\0') == true // works as expected

	re2 := regex.regex_opt('^abc\0xyz$')!
	assert re2.matches_string('abc' + 'xyz') == false // works as expected
	assert re2.matches_string('abc\0xyz') == true // works as expected
}

Reproduction Steps

Run the above code

Expected Behavior

run successfully

Current Behavior

src/main.v:5: FAIL: fn main.main: assert re1.matches_string('abc') == false
   left value: re1.matches_string('abc') = true
  right value: false
V panic: Assertion failed..

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.2 d86b368

Environment details (OS name and version, etc.)

V full version: V 0.4.2 4bc9a8f.d86b368
OS: linux, Linux version 6.5.9-200.fc38.x86_64 (mockbuild@1cc7d6d790524511abd343182a21832a) (gcc (GCC) 13.2.1 20231011 (Red Hat 13.2.1-4), GNU ld version 2.39-15.fc38) #1 SMP PREEMPT_DYNAMIC Wed Oct 25 20:40:49 UTC 2023
Processor: 4 cpus, 64bit, little endian, Intel(R) Core(TM) i5-4310U CPU @ 2.00GHz

getwd: /home/user/Projects/v-testing/hypixel
vexe: /home/user/.local/lib/v/v
vexe mtime: 2023-11-07 14:28:20

vroot: OK, value: /home/user/.local/lib/v
VMODULES: OK, value: /home/user/.vmodules
VTMP: OK, value: /tmp/v_1002

Git version: git version 2.41.0
Git vroot status: weekly.2023.44-76-gd86b3689
.git/config present: true

CC version: cc (GCC) 13.2.1 20231011 (Red Hat 13.2.1-4)
thirdparty/tcc status: thirdparty-linux-amd64 12f392c3

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