Auto merge of #136454 - matthiaskrgr:rollup-ewejzmp, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #136145 (Test validity of pattern types)
 - #136339 (CompileTest: Add Directives to Ignore `arm-unknown-*` Targets)
 - #136403 (Fix malformed error annotations in a UI test)
 - #136414 (Shorten error message for callable with wrong return type)
 - #136425 (Move `rustc_middle::infer::unify_key`)
 - #136426 (Explain why we retroactively change a static initializer to have a different type)
 - #136445 (Couple of cleanups to DiagCtxt and EarlyDiagCtxt)
 - #136452 (Miri subtree update)

r? `@ghost`
`@rustbot` modify labels: rollup

examples/rustc-interface-getting-diagnostics.rs

@@ -10,15 +10,15 @@ extern crate rustc_interface;
 extern crate rustc_session;
 extern crate rustc_span;
 
+use std::sync::{Arc, Mutex};
+
 use rustc_errors::emitter::Emitter;
 use rustc_errors::registry::{self, Registry};
 use rustc_errors::translation::Translate;
 use rustc_errors::{DiagCtxt, DiagInner, FluentBundle};
 use rustc_session::config;
 use rustc_span::source_map::SourceMap;
 
-use std::sync::{Arc, Mutex};
-
 struct DebugEmitter {
     source_map: Arc<SourceMap>,
     diagnostics: Arc<Mutex<Vec<DiagInner>>>,
@@ -67,10 +67,10 @@ fn main() {
         locale_resources: rustc_driver::DEFAULT_LOCALE_RESOURCES.to_owned(),
         lint_caps: rustc_hash::FxHashMap::default(),
         psess_created: Some(Box::new(|parse_sess| {
-            parse_sess.set_dcx(DiagCtxt::new(Box::new(DebugEmitter {
+            parse_sess.dcx().set_emitter(Box::new(DebugEmitter {
                 source_map: parse_sess.clone_source_map(),
                 diagnostics,
-            })));
+            }));
         })),
         register_lints: None,
         override_queries: None,