From 4207faab09300ed7a2c91638cae787b967ff6442 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sat, 24 Jun 2023 19:40:47 -0700
Subject: [PATCH] Fix overflow in delimiter_of_raw_string at end of input

---
 src/parse.rs | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/src/parse.rs b/src/parse.rs
index 9bf5bd0..6c5cb41 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -468,22 +468,20 @@ fn cooked_byte_string(mut input: Cursor) -> Result<Cursor, Reject> {
 }
 
 fn delimiter_of_raw_string(input: Cursor) -> PResult<&str> {
-    let mut n = 0;
     for (i, byte) in input.bytes().enumerate() {
         match byte {
             b'"' => {
-                n = i;
-                break;
+                if i > 255 {
+                    // https://github.com/rust-lang/rust/pull/95251
+                    return Err(Reject);
+                }
+                return Ok((input.advance(i + 1), &input.rest[..i]));
             }
             b'#' => {}
-            _ => return Err(Reject),
+            _ => break,
         }
     }
-    if n > 255 {
-        // https://github.com/rust-lang/rust/pull/95251
-        return Err(Reject);
-    }
-    Ok((input.advance(n + 1), &input.rest[..n]))
+    Err(Reject)
 }
 
 fn raw_byte_string(input: Cursor) -> Result<Cursor, Reject> {