subscriber: revert "subscriber: update time crate to 0.3.18 (#2550)"

This reverts commit 9744ec0. This
change breaks MSRV compatibility, and was accidentally auto-merged due
to what appears to be an issue with the CI configuration, which
(apparently) doesn't require the MSRV minimal-versions check runs to
complete before allowing a branch to merge.

We'll have to solve the original issue here through documentation for
now. See [this comment] for details.

[this comment]: #2550 (comment)

Author: hawkw

tracing-subscriber/Cargo.toml

@@ -49,7 +49,7 @@ once_cell = { optional = true, version = "1.13.0" }
 # fmt
 tracing-log = { path = "../tracing-log", version = "0.2", optional = true, default-features = false, features = ["log-tracer", "std"] }
 nu-ansi-term = { version = "0.46.0", optional = true }
-time = { version = "0.3.18", features = ["formatting"], optional = true }
+time = { version = "0.3.2", features = ["formatting"], optional = true }
 
 # only required by the json feature
 serde_json = { version = "1.0.82", optional = true }
@@ -73,7 +73,7 @@ regex = { version = "1.6.0", default-features = false, features = ["std"] }
 tracing-futures = { path = "../tracing-futures", version = "0.3", default-features = false, features = ["std-future", "std"] }
 tokio = { version = "1.20.0", features = ["rt", "macros"] }
 # Enable the `time` crate's `macros` feature, for examples.
-time = { version = "0.3.18", features = ["formatting", "macros"] }
+time = { version = "0.3.2", features = ["formatting", "macros"] }
 
 [badges]
 maintenance = { status = "experimental" }

tracing-subscriber/src/fmt/time/time_crate.rs

@@ -6,6 +6,17 @@ use time::{format_description::well_known, formatting::Formattable, OffsetDateTi
 ///
 /// To format the current [UTC time] instead, use the [`UtcTime`] type.
 ///
+/// <div class="example-wrap" style="display:inline-block">
+/// <pre class="compile_fail" style="white-space:normal;font:inherit;">
+///     <strong>Warning</strong>: The <a href = "https://docs.rs/time/0.3/time/"><code>time</code>
+///     crate</a> must be compiled with <code>--cfg unsound_local_offset</code> in order to use
+///     local timestamps. When this cfg is not enabled, local timestamps cannot be recorded, and
+///     events will be logged without timestamps.
+///
+///    See the <a href="https://docs.rs/time/0.3.4/time/#feature-flags"><code>time</code>
+///    documentation</a> for more details.
+/// </pre></div>
+///
 /// [local time]: https://docs.rs/time/0.3/time/struct.OffsetDateTime.html#method.now_local
 /// [UTC time]: https://docs.rs/time/0.3/time/struct.OffsetDateTime.html#method.now_utc
 /// [formatter]: https://docs.rs/time/0.3/time/formatting/trait.Formattable.html
@@ -65,6 +76,19 @@ impl<F: Formattable> LocalTime<F> {
     /// [`time` crate] with the provided provided format. The format may be any
     /// type that implements the [`Formattable`] trait.
     ///
+    ///
+    /// <div class="example-wrap" style="display:inline-block">
+    /// <pre class="compile_fail" style="white-space:normal;font:inherit;">
+    ///     <strong>Warning</strong>: The <a href = "https://docs.rs/time/0.3/time/">
+    ///     <code>time</code> crate</a> must be compiled with <code>--cfg
+    ///     unsound_local_offset</code> in order to use local timestamps. When this
+    ///     cfg is not enabled, local timestamps cannot be recorded, and
+    ///     events will be logged without timestamps.
+    ///
+    ///    See the <a href="https://docs.rs/time/0.3.4/time/#feature-flags">
+    ///    <code>time</code> documentation</a> for more details.
+    /// </pre></div>
+    ///
     /// Typically, the format will be a format description string, or one of the
     /// `time` crate's [well-known formats].
     ///