Address rust-lang/rust#111633

Author: smoelius

cargo-dylint/tests/boundary_toolchains.rs

@@ -7,9 +7,19 @@ use test_log::test;
 
 // smoelius: The channel date is one day later than the `rustc --version` date.
 // smoelius: Put recent boundaries first, since they're more likely to cause problems.
-const BOUNDARIES: [(&str, &str); 3] = [
+// smoelius: The relevant PRs and merge commits appear before each boundary.
+const BOUNDARIES: [(&str, &str); 4] = [
+    // https://github.com/rust-lang/rust/pull/111633
+    // https://github.com/rust-lang/rust/commit/08efb9d652c840715d15954592426e2befe13b36
+    ("2023-05-18", "2023-05-19"),
+    // https://github.com/rust-lang/rust/pull/106810
+    // https://github.com/rust-lang/rust/commit/65d2f2a5f9c323c88d1068e8e90d0b47a20d491c
     ("2023-01-19", "2023-01-20"),
+    // https://github.com/rust-lang/rust/pull/101501
+    // https://github.com/rust-lang/rust/commit/87788097b776f8e3662f76627944230684b671bd
     ("2022-09-08", "2022-09-09"),
+    // https://github.com/rust-lang/rust/pull/98975
+    // https://github.com/rust-lang/rust/commit/0ed9c64c3e63acac9bd77abce62501696c390450
     ("2022-07-14", "2022-07-15"),
 ];
 

driver/src/lib.rs

@@ -117,13 +117,16 @@ impl Callbacks {
                 let result = libloading::Library::new(&path);
 
                 let lib = result.unwrap_or_else(|err| {
+                    // smoelius: rust-lang/rust#111633 changed the type of `early_error`'s `msg`
+                    // argument from `&str` to `impl Into<DiagnosticMessage>`.
                     rustc_session::early_error(
                         rustc_session::config::ErrorOutputType::default(),
-                        &format!(
+                        format!(
                             "could not load library `{}`: {}",
                             path.to_string_lossy(),
                             err
-                        ),
+                        )
+                        .as_str(),
                     );
                 });
 

utils/linting/src/lib.rs

@@ -457,7 +457,7 @@ pub fn init_config(sess: &rustc_session::Session) {
     try_init_config(sess).unwrap_or_else(|err| {
         rustc_session::early_error(
             rustc_session::config::ErrorOutputType::default(),
-            &format!("could not read configuration file: {err}"),
+            format!("could not read configuration file: {err}").as_str(),
         );
     });
 }