Auto merge of #117843 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum 1.74.0

[stable] Prepare 1.74.0 release

https://forge.rust-lang.org/release/process.html#promote-branches-t-3-days-monday

Also backports:

* Disabling specialization as an alternative backport of "Fix excessive initialization and reads beyond EOF in io::copy(_, Vec<u8>) specialization #117576"
*  coverage: Avoid creating malformed macro name spans #117827

r? `@Mark-Simulacrum`

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/run-coverage/macro_name_span.rs b/tests/run-coverage/macro_name_span.rs
new file mode 100644
index 00000000000..5d15977c498
--- /dev/null
+++ b/tests/run-coverage/macro_name_span.rs
@@ -0,0 +1,25 @@
+// edition: 2021
+
+// Regression test for <https://github.com/rust-lang/rust/issues/117788>.
+// Under some circumstances, the heuristics that detect macro name spans can
+// get confused and produce incorrect spans beyond the bounds of the span
+// being processed.
+
+// aux-build: macro_name_span_helper.rs
+extern crate macro_name_span_helper;
+
+fn main() {
+    affected_function();
+}
+
+macro_rules! macro_with_an_unreasonably_and_egregiously_long_name {
+    () => {
+        println!("hello");
+    };
+}
+
+macro_name_span_helper::macro_that_defines_a_function! {
+    fn affected_function() {
+        macro_with_an_unreasonably_and_egregiously_long_name!();
+    }
+}