crash on openbsd with set_time_offset_to_local()

[labannah9125]

not sure why it crash but works on other platforms. removing unwrap() seems to work BUT isnt localtime.
maybe another patch from @botovq interfering to rust on the os?

% cat Cargo.toml
[package]
name = "simplelog-demo"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
log = "0.4.20"
simplelog = "0.12.1"

% cat src/main.rs
use log::*;
use simplelog::{CombinedLogger, ConfigBuilder, LevelFilter, SimpleLogger, WriteLogger};
use std::fs;

fn main() {
    let _ = setup_logger("debug");
    info!("Hello world!");
}

fn setup_logger(log_level: &str) -> Result<(), Box<dyn std::error::Error>> {
    let log_file_path = format!("./{}.log", env!("CARGO_PKG_NAME"));
    let log_file = fs::OpenOptions::new()
        .append(true)
        .create(true)
        .write(true)
        .open(log_file_path)?;

    // Split the confguration between stdout and file logging for less noisy output in the stdout
    // keeping full details in log lived log files.
    let mut log_stdout_config_builder = ConfigBuilder::new();
    log_stdout_config_builder
        .set_time_offset_to_local()
        .unwrap();
    let mut log_file_config_builder = ConfigBuilder::new();
    log_file_config_builder
        .set_time_format_rfc3339()
        .set_time_offset_to_local()
        .unwrap();

    // Any invalid log level will simply use the default of "info".
    let log_level = match log_level {
        "debug" => LevelFilter::Debug,
        "info" => LevelFilter::Info,
        "error" => LevelFilter::Error,
        "warn" => LevelFilter::Warn,
        _ => LevelFilter::Info,
    };

    // If unable to write to the log file, only output to the terminal.
    if CombinedLogger::init(vec![
        SimpleLogger::new(log_level, log_stdout_config_builder.build()),
        WriteLogger::new(log_level, log_file_config_builder.build(), log_file),
    ])
    .is_err()
    {
        SimpleLogger::new(log_level, log_stdout_config_builder.build());
    }

    Ok(())
}

% RUST_BACKTRACE=1 cargo run
    Finished dev [unoptimized + debuginfo] target(s) in 0.02s
     Running `target/debug/simplelog-demo`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: ConfigBuilder(Config { time: Error, level: Error, level_padding: Off, thread: Debug, thread_log_mode: IDs, thread_padding: Off, target: Debug, target_padding: Off, location: Trace, time_format: Custom([Hour(Hour { padding: Zero, is_12_hour_clock: false }), :, Minute(Minute { padding: Zero }), :, Second(Second { padding: Zero })]), time_offset: +00:00:00, filter_allow: [], filter_ignore: [], level_color: [None, Some(Red), Some(Yellow), Some(Blue), Some(Cyan), Some(White)], write_log_enable_colors: false })', src/main.rs:23:10
stack backtrace:
   0: rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::result::unwrap_failed
   3: core::result::Result<T,E>::unwrap
             at /usr/obj/ports/rust-1.72.1/rustc-1.72.1-src/library/core/src/result.rs:1076:23
   4: simplelog_demo::setup_logger
             at ./src/main.rs:21:5
   5: simplelog_demo::main
             at ./src/main.rs:6:13
   6: core::ops::function::FnOnce::call_once
             at /usr/obj/ports/rust-1.72.1/rustc-1.72.1-src/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[qarmin]

I had similar problem on single board, custom linux device and I found solution(but not sure if this will work on openbsd)
3 possible solutions with different crates to use local time instead utc:

• time crate - safe, but not always works - The call to localtime_r may be unsound time-rs/time#293 - https://github.com/qarmin/handsome_logger/blob/756f1385132e563fcf508a9a0b47207c6f74aa1c/src/config.rs#L344-L347
• chrono crate - unsafe method, but for me worked fine - https://github.com/qarmin/handsome_logger/blob/2dae74d943eb056969db1f6e0e59158469eb2bf4/src/config.rs#L260-L268
• tz crate - safe pure rust solution, works only on unix - https://github.com/qarmin/handsome_logger/blob/756f1385132e563fcf508a9a0b47207c6f74aa1c/src/config.rs#L334-L343