Loading a zoneinfo database on Windows causes IANA names to use the Windows path separator

[beer-psi]

Using a zoneinfo database on Windows (by setting the TZDIR environment variable) causes IANA names to use Windows path separators and failing all timezone lookups. Can also be replicated under Wine on Linux.

Reproduction:

src/main.rs:

use std::fs::File;

fn main() {
    simplelog::WriteLogger::init(
        log::LevelFilter::Trace,
        simplelog::ConfigBuilder::new()
            .set_thread_level(log::LevelFilter::Off)
            .set_location_level(log::LevelFilter::Off)
            .build(),
        File::create("test.log").unwrap(),
    )
    .unwrap();
    println!("Asia/Tokyo: {:?}", jiff::tz::db().get("Asia/Tokyo"));
    println!("Asia\\Tokyo: {:?}", jiff::tz::db().get("Asia\\Tokyo"));
}

Cargo.toml:

[package]
name = "jiff-zoneinfo-windows"
version = "0.1.0"
edition = "2024"

[dependencies]
jiff = { version = "0.2.21", features = ["logging"] }
log = "0.4.29"
simplelog = "0.12.2"

Run on Windows:

set TZDIR=C:/path/to/zoneinfo
cargo run

Run on Linux under Wine (build with cargo-xwin):

cargo xwin build
TZDIR=/usr/share/zoneinfo wine target/debug/jiff-zoneinfo-windows.exe

Program output:

Asia/Tokyo: Err(failed to find time zone `Asia/Tokyo` in time zone database)
Asia\Tokyo: Ok(TimeZone(TZif("Asia\\Tokyo")))

Log output:

14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: opening zoneinfo database at TZDIR=/usr/share/zoneinfo
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\CET
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\CST6CDT
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Cuba
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\EET
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Egypt
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Eire
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\EST
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\EST5EDT
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Factory
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\GB
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\GB-Eire
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\GMT
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\GMT+0
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\GMT-0
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\GMT0
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Greenwich
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Hongkong
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\HST
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Iceland
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Iran
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\iso3166.tab
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Israel
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Jamaica
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Japan
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Kwajalein
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\leap-seconds.list
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\leapseconds
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Libya
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\MET
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\MST
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\MST7MDT
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Navajo
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\NZ
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\NZ-CHAT
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Poland
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Portugal
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\posixrules
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\PRC
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\PST8PDT
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\ROC
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\ROK
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\SECURITY
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Singapore
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Turkey
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\tzdata.zi
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\UCT
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Universal
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\UTC
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\W-SU
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\WET
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\zone.tab
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\zone1970.tab
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\zonenow.tab
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Zulu
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Alaska
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Aleutian
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Arizona
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Central
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\East-Indiana
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Eastern
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Hawaii
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Indiana-Starke
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Michigan
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Mountain
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Pacific
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\US\Samoa
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Apia
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Auckland
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Bougainville
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Chatham
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Chuuk
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Easter
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Efate
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Enderbury
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Fakaofo
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Fiji
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Funafuti
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Galapagos
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Gambier
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Guadalcanal
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Guam
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Honolulu
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Johnston
14:12:53 [TRACE] jiff::tz::db::zoneinfo::inner: zoneinfo database initialization visiting /usr/share/zoneinfo\Pacific\Kanton
...
14:12:53 [DEBUG] jiff::tz::db: initialized global time zone database: TimeZoneDatabase(ZoneInfo(/usr/share/zoneinfo))