C Compiler error after upgrade to 0.4.10

[fleximus]

Describe the bug

After upating v from 0.4.9 to 0.4.10 this (stripped down) server.v code doesn't compile anymore:

import veb
import x.json2

pub struct Context {
    veb.Context
}

pub struct App {
	veb.Middleware[Context]
}

@['/'; POST]
fn (app &App) index(mut ctx Context) veb.Result {
	j := json2.raw_decode(ctx.req.data) or { 
		return ctx.request_error("error")
	}

	m := j.as_map()
	myarr := m['myarr'] or { panic(error) }
	m2 := myarr.arr()

	for mc in m2 {
		parts := mc.arr()

		// Compiler error occurs here -->
		first  := parts[0].str()
		second := parts[1].str()
		third  := parts[2].str()

		println("1. ${first}, 2. ${second}, 3. ${third}")
	}

	return ctx.ok("ok")
}

fn main(){
	mut app := &App{}
	veb.run[App, Context](mut app, 3000)
}

Reproduction Steps

Simply try to compile v server.v

Expected Behavior

No compiling issues.

Current Behavior

% v server.v 
================== C compilation error (from tcc): ==============
cc: /tmp/v_1000/server.01JT9M27J0TC65V48EZBS0WVS1.tmp.c:16742: warning: implicit declaration of function 'time__Time_local_to_utc'
cc: /tmp/v_1000/server.01JT9M27J0TC65V48EZBS0WVS1.tmp.c:16742: error: '{' expected (got ";")
=================================================================
(You can pass `-cg`, or `-show-c-output` as well, to print all the C error messages).
builder error: 
==================
C error found. It should never happen, when compiling pure V code.
This is a V compiler bug, please report it using `v bug file.v`,
or goto https://github.com/vlang/v/issues/new/choose .
You can also use #help on Discord: https://discord.gg/vlang .

Possible Solution

No response

Additional Information/Context

Interestingly, this code snippet works as it also uses json2.raw_decode:

import x.json2


fn main() {
        j := json2.raw_decode('{"myarr" : [["first", "second", "third"]]}') or { 
                panic(err)
        }

        m := j.as_map()
        myarr := m['myarr'] or { panic(error) }
        m2 := myarr.arr()

        for mc in m2 {
                parts := mc.arr()

                first  := parts[0].str()
                second := parts[1].str()
                third  := parts[2].str()

                println("1. ${first}, 2. ${second}, 3. ${third}")
        }
}

V version

0.4.10 875c165

Environment details (OS name and version, etc.)

V full version	V 0.4.10 9ae8cc3.875c165
OS	linux, Linux Mint 22.1
Processor	6 cpus, 64bit, little endian, Intel(R) Core(TM) i5-9500T CPU @ 2.20GHz
Memory	16.58GB/62.15GB
V executable	/home/flex/v/v
V last modified time	2025-05-02 21:26:10
V home dir	OK, value: /home/flex/v
VMODULES	OK, value: /home/flex/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /tmp/v_bug
Git version	git version 2.43.0
V git status	weekly.2025.12-217-g875c1654
.git/config present	true
cc version	cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
gcc version	gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
clang version	Ubuntu clang version 18.1.3 (1ubuntu1)
tcc version	tcc version 0.9.28rc 2024-07-31 HEAD@1cee0908 (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 0134e9b9
emcc version	N/A
glibc version	ldd (Ubuntu GLIBC 2.39-0ubuntu8.4) 2.39

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[huly-for-github]

Connected to Huly®: V_0.6-22769

[felipensp]

As a temporary workaround you can use: -no-skip-unused flag