Update minimum Rust version to 1.78 (#3412)

.github/workflows/CI.yml

@@ -2,7 +2,7 @@ name: CI
 
 env:
   CARGO_TERM_COLOR: always
-  MSRV: '1.75'
+  MSRV: '1.78'
 
 on:
   push:

Cargo.lock

@@ -327,7 +327,6 @@ dependencies = [
  "quickcheck",
  "quickcheck_macros",
  "reqwest 0.12.12",
- "rustversion",
  "serde",
  "serde_json",
  "serde_path_to_error",

Cargo.toml

@@ -7,7 +7,7 @@ exclude = ["examples/async-graphql"]
 resolver = "2"
 
 [workspace.package]
-rust-version = "1.75"
+rust-version = "1.78"
 
 [workspace.lints.rust]
 unsafe_code = "forbid"

axum-core/src/extract/mod.rs

@@ -47,11 +47,8 @@ mod private {
 /// See [`axum::extract`] for more general docs about extractors.
 ///
 /// [`axum::extract`]: https://docs.rs/axum/0.8/axum/extract/index.html
-#[rustversion::attr(
-    since(1.78),
-    diagnostic::on_unimplemented(
-        note = "Function argument is not a valid axum extractor. \nSee `https://docs.rs/axum/0.8/axum/extract/index.html` for details",
-    )
+#[diagnostic::on_unimplemented(
+    note = "Function argument is not a valid axum extractor. \nSee `https://docs.rs/axum/0.8/axum/extract/index.html` for details"
 )]
 pub trait FromRequestParts<S>: Sized {
     /// If the extractor fails it'll use this "rejection" type. A rejection is
@@ -76,11 +73,8 @@ pub trait FromRequestParts<S>: Sized {
 /// See [`axum::extract`] for more general docs about extractors.
 ///
 /// [`axum::extract`]: https://docs.rs/axum/0.8/axum/extract/index.html
-#[rustversion::attr(
-    since(1.78),
-    diagnostic::on_unimplemented(
-        note = "Function argument is not a valid axum extractor. \nSee `https://docs.rs/axum/0.8/axum/extract/index.html` for details",
-    )
+#[diagnostic::on_unimplemented(
+    note = "Function argument is not a valid axum extractor. \nSee `https://docs.rs/axum/0.8/axum/extract/index.html` for details"
 )]
 pub trait FromRequest<S, M = private::ViaRequest>: Sized {
     /// If the extractor fails it'll use this "rejection" type. A rejection is

axum/Cargo.toml

@@ -62,7 +62,6 @@ memchr = "2.4.1"
 mime = "0.3.16"
 percent-encoding = "2.1"
 pin-project-lite = "0.2.7"
-rustversion = "1.0.9"
 serde = "1.0"
 sync_wrapper = "1.0.0"
 tower = { version = "0.5.2", default-features = false, features = ["util"] }

axum/README.md

@@ -104,7 +104,7 @@ This crate uses `#![forbid(unsafe_code)]` to ensure everything is implemented in
 
 ## Minimum supported Rust version
 
-axum's MSRV is 1.75.
+axum's MSRV is 1.78.
 
 ## Examples
 

axum/src/handler/mod.rs

@@ -125,11 +125,8 @@ pub use self::service::HandlerService;
 ///     )));
 /// # let _: Router = app;
 /// ```
-#[rustversion::attr(
-    since(1.78),
-    diagnostic::on_unimplemented(
-        note = "Consider using `#[axum::debug_handler]` to improve the error message"
-    )
+#[diagnostic::on_unimplemented(
+    note = "Consider using `#[axum::debug_handler]` to improve the error message"
 )]
 pub trait Handler<T, S>: Clone + Send + Sync + Sized + 'static {
     /// The type of future calling this handler returns.