Auto merge of #66189 - Centril:rollup-3bsf45s, r=Centril

Rollup of 5 pull requests

Successful merges:

 - #63793 (Have tidy ensure that we document all `unsafe` blocks in libcore)
 - #64696 ([rustdoc] add sub settings)
 - #65916 (syntax: move stuff around)
 - #66087 (Update some build-pass ui tests to use check-pass where applicable)
 - #66182 (invalid_value lint: fix help text)

Failed merges:

r? @ghost

1 files changed, 9 insertions, 1 deletions

diff --git a/src/librustc_errors/lib.rs b/src/librustc_errors/lib.rs
index 67c180a05e9..fb5cccf61a7 100644
--- a/src/librustc_errors/lib.rs
+++ b/src/librustc_errors/lib.rs
@@ -15,7 +15,8 @@ use Level::*;
 
 use emitter::{Emitter, EmitterWriter, is_case_difference};
 use registry::Registry;
-
+#[cfg(target_arch = "x86_64")]
+use rustc_data_structures::static_assert_size;
 use rustc_data_structures::sync::{self, Lrc, Lock};
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
 use rustc_data_structures::stable_hasher::StableHasher;
@@ -48,6 +49,13 @@ use syntax_pos::{
     SpanSnippetError,
 };
 
+pub type PResult<'a, T> = Result<T, DiagnosticBuilder<'a>>;
+
+// `PResult` is used a lot. Make sure it doesn't unintentionally get bigger.
+// (See also the comment on `DiagnosticBuilderInner`.)
+#[cfg(target_arch = "x86_64")]
+static_assert_size!(PResult<'_, bool>, 16);
+
 /// Indicates the confidence in the correctness of a suggestion.
 ///
 /// All suggestions are marked with an `Applicability`. Tools use the applicability of a suggestion