Bug while practicing copying the concurrency examples

[jorgeluismireles]

V doctor:

V full version: V 0.4.6 2cde320.0ebf184
OS: linux, Ubuntu 20.04.6 LTS
Processor: 4 cpus, 64bit, little endian, Intel(R) Core(TM) i3-4150 CPU @ 3.50GHz

getwd: /home/jorge/go/src/gitlab.com/jmireles/v/concurrency
vexe: /home/jorge/v/v
vexe mtime: 2024-07-21 17:44:09

vroot: OK, value: /home/jorge/v
VMODULES: OK, value: /home/jorge/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.25.1
Git vroot status: weekly.2024.29-19-g0ebf184c
.git/config present: true

CC version: cc (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
thirdparty/tcc status: thirdparty-linux-amd64 a0799a5b

What did you do?
v -g -o vdbg cmd/v && vdbg http.v

import net.http
import sync
import time

fn vlang_time(mut wg sync.WaitGroup) !string {
	start := time.ticks()
	data := http.get('https://vlang.io/utc_now')!
	finish := time.ticks()
	println('Finish getting time ${finish - start} ms')
	println(data.body)
	wg.done()
	return data.body
}

fn remote_ip(mut wg sync.WaitGroup) !string {
	start := time.ticks()
	data := http.get('https://api.ipify.org')!
	finish := time.ticks()
	println('Finish getting ip ${finish - start} ms')
	println(data.body)
	wg.done()
	return data.body
}

fn main() {
	mut wg := sync.new_waitgroup()
	wg.add(2)
	spawn vlang_time(mut wg)
	spawn vlang_ip(mut wg)
	wg.wait()
}

What did you expect to see?

The same that github.com/vlang/v/blob/master/examples/concurrency/concurrency_http.v

What did you see instead?

================ V panic ================
   module: v.ast
 function: default_table_panic_handler()
  message: final_sym: invalid type (typ=ast.Type(0x0 = 0) idx=0). Compiler bug. This should never happen. Please report the bug using `v bug file.v`.
     file: /home/jorge/v/vlib/v/ast/table.v:86
   v hash: 0ebf184
=========================================
/tmp/v_1000/../../../../../../home/jorge/v/vlib/builtin/builtin.c.v:83: at panic_debug: Backtrace
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/ast/table.v:86: by v__ast__default_table_panic_handler
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/ast/table.v:92: by v__ast__Table_panic
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/ast/table.v:703: by v__ast__Table_final_sym
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/fn.v:2587: by v__checker__Checker_spawn_expr
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/checker.v:2891: by v__checker__Checker_expr
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/checker.v:2123: by v__checker__Checker_stmt
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/checker.v:2665: by v__checker__Checker_stmts_ending_with_expression
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/checker.v:2633: by v__checker__Checker_stmts
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/fn.v:427: by v__checker__Checker_fn_decl
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/checker.v:2157: by v__checker__Checker_stmt
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/checker.v:261: by v__checker__Checker_check
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/checker/checker.v:323: by v__checker__Checker_check_files
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/builder/builder.v:132: by v__builder__Builder_middle_stages
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/builder/builder.v:159: by v__builder__Builder_front_and_middle_stages
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/builder/cbuilder/cbuilder.v:71: by v__builder__cbuilder__gen_c
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/builder/cbuilder/cbuilder.v:59: by v__builder__cbuilder__build_c
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/builder/cbuilder/cbuilder.v:49: by v__builder__cbuilder__compile_c
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/builder/rebuilding.v:324: by v__builder__Builder_rebuild
/tmp/v_1000/../../../../../../home/jorge/v/vlib/v/builder/compile.v:17: by v__builder__compile
/tmp/v_1000/../../../../../../home/jorge/v/cmd/v/v.v:187: by main__rebuild
/tmp/v_1000/../../../../../../home/jorge/v/cmd/v/v.v:145: by main__main
/tmp/v_1000/../../../../../../tmp/v_1000/vdbg.01J3B6A8SEC9MTE5A75DS8Q98Y.tmp.c:44802: by main

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