From 4bc6b1fd2a5581662170c28aae47b50937eeb5d8 Mon Sep 17 00:00:00 2001
From: StackOverflowExcept1on
 <109800286+StackOverflowExcept1on@users.noreply.github.com>
Date: Sat, 24 Aug 2024 02:20:36 +0300
Subject: [PATCH] Pass `fmt::Arguments` by reference to `PanicInfo` and
 `PanicMessage`

---
 core/src/panic/panic_info.rs | 12 ++++++------
 core/src/panicking.rs        |  4 ++--
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/core/src/panic/panic_info.rs b/core/src/panic/panic_info.rs
index e4d0c897b65ca..af2c83b546071 100644
--- a/core/src/panic/panic_info.rs
+++ b/core/src/panic/panic_info.rs
@@ -12,7 +12,7 @@ use crate::panic::Location;
 #[stable(feature = "panic_hooks", since = "1.10.0")]
 #[derive(Debug)]
 pub struct PanicInfo<'a> {
-    message: fmt::Arguments<'a>,
+    message: &'a fmt::Arguments<'a>,
     location: &'a Location<'a>,
     can_unwind: bool,
     force_no_backtrace: bool,
@@ -26,13 +26,13 @@ pub struct PanicInfo<'a> {
 /// See [`PanicInfo::message`].
 #[stable(feature = "panic_info_message", since = "1.81.0")]
 pub struct PanicMessage<'a> {
-    message: fmt::Arguments<'a>,
+    message: &'a fmt::Arguments<'a>,
 }
 
 impl<'a> PanicInfo<'a> {
     #[inline]
     pub(crate) fn new(
-        message: fmt::Arguments<'a>,
+        message: &'a fmt::Arguments<'a>,
         location: &'a Location<'a>,
         can_unwind: bool,
         force_no_backtrace: bool,
@@ -146,7 +146,7 @@ impl Display for PanicInfo<'_> {
         formatter.write_str("panicked at ")?;
         self.location.fmt(formatter)?;
         formatter.write_str(":\n")?;
-        formatter.write_fmt(self.message)?;
+        formatter.write_fmt(*self.message)?;
         Ok(())
     }
 }
@@ -177,7 +177,7 @@ impl<'a> PanicMessage<'a> {
 impl Display for PanicMessage<'_> {
     #[inline]
     fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-        formatter.write_fmt(self.message)
+        formatter.write_fmt(*self.message)
     }
 }
 
@@ -185,6 +185,6 @@ impl Display for PanicMessage<'_> {
 impl fmt::Debug for PanicMessage<'_> {
     #[inline]
     fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-        formatter.write_fmt(self.message)
+        formatter.write_fmt(*self.message)
     }
 }
diff --git a/core/src/panicking.rs b/core/src/panicking.rs
index 7affe63825719..87eb9eefb5462 100644
--- a/core/src/panicking.rs
+++ b/core/src/panicking.rs
@@ -64,7 +64,7 @@ pub const fn panic_fmt(fmt: fmt::Arguments<'_>) -> ! {
     }
 
     let pi = PanicInfo::new(
-        fmt,
+        &fmt,
         Location::caller(),
         /* can_unwind */ true,
         /* force_no_backtrace */ false,
@@ -102,7 +102,7 @@ pub const fn panic_nounwind_fmt(fmt: fmt::Arguments<'_>, force_no_backtrace: boo
 
         // PanicInfo with the `can_unwind` flag set to false forces an abort.
         let pi = PanicInfo::new(
-            fmt,
+            &fmt,
             Location::caller(),
             /* can_unwind */ false,
             force_no_backtrace,