Must load timezone before starting threads

Cargo.toml

@@ -44,7 +44,7 @@ snap = "1.0.0"
 tempfile = "3"
 thiserror = "1.0.19"
 thousands = "0.2.0"
-time = { version = "0.3", features = [
+time = { version = "0.3.28", features = [
     "local-offset",
     "serde",
     "serde-human-readable",

src/bin/conserve.rs

@@ -24,6 +24,7 @@ use conserve::change::Change;
 use conserve::progress::ProgressImpl;
 use conserve::trace_counter::{global_error_count, global_warn_count};
 use metrics::increment_counter;
+use time::UtcOffset;
 #[allow(unused_imports)]
 use tracing::{debug, error, info, trace, warn, Level};
 
@@ -292,6 +293,9 @@ impl std::process::Termination for ExitCode {
 impl Command {
     fn run(&self) -> Result<ExitCode> {
         let mut stdout = std::io::stdout();
+        // Before anything else, get the local time offset, to avoid `time-rs`
+        // problems with loading it when threads are running.
+        let local_offset = UtcOffset::current_local_offset().expect("get local time offset");
         match self {
             Command::Backup {
                 archive,
@@ -516,11 +520,12 @@ impl Command {
                 sizes,
                 utc,
             } => {
+                let timezone = if *utc { None } else { Some(local_offset) };
                 let archive = Archive::open(open_transport(archive)?)?;
                 let options = ShowVersionsOptions {
                     newest_first: *newest,
                     tree_size: *sizes,
-                    utc: *utc,
+                    timezone,
                     start_time: !*short,
                     backup_duration: !*short,
                 };

src/show.rs

@@ -39,8 +39,8 @@ pub struct ShowVersionsOptions {
     pub start_time: bool,
     /// Show how much time the backup took, or "incomplete" if it never finished.
     pub backup_duration: bool,
-    /// Show times in UTC rather than the local timezone.
-    pub utc: bool,
+    /// Show times in this zone.
+    pub timezone: Option<UtcOffset>,
 }
 
 /// Print a list of versions, one per line.
@@ -53,7 +53,6 @@ pub fn show_versions(
     if options.newest_first {
         band_ids.reverse();
     }
-    let local_offset = UtcOffset::current_local_offset().expect("get local time offset");
     for band_id in band_ids {
         if !(options.tree_size || options.start_time || options.backup_duration) {
             writeln!(w, "{band_id}")?;
@@ -78,8 +77,8 @@ pub fn show_versions(
 
         if options.start_time {
             let mut start_time = info.start_time;
-            if !options.utc {
-                start_time = start_time.to_offset(local_offset);
+            if let Some(timezone) = options.timezone {
+                start_time = start_time.to_offset(timezone);
             }
             l.push(format!(
                 "{date:<25}", // "yyyy-mm-ddThh:mm:ss+oooo" => 25